brain

tamnd's digital brain — notes, problems, research

43815 notes

规律 (guīlǜ) — rule; pattern; regularity

HSK 3 | noun | a regular pattern or rule observed in nature or life

hsk-3vocabularya2
右边 (yòubiān) — right side; to the right

HSK 2 | noun | direction word indicating the right-hand side

hsk-2vocabularya1
形态 (xíngtài) — form, shape, mode

HSK 6 | n | the form, configuration, or mode of existence of something; morphology

hsk-6vocabularyc1
〜から — From; Because
japanesegrammarn5particles
刚才 (gāngcái) — just now; a moment ago

HSK 2 | time word | refers to a moment in the very recent past; contrast with 刚

hsk-2vocabularya1
Lesson 5: The Ablative Absolute — Mastery

Complete guide to all six patterns of the ablative absolute and five strategies for translating it in context.

latinintermediatelesson
综上所述 (zōng shàng suǒ shù) — in summary; to summarise the above

HSK 5 | discourse marker | in summary, to summarise what has been said above

hsk-5vocabularyb2
客观 (kèguān) — objective; impartial

HSK 5 | adjective/adverb | not influenced by personal feelings; based on observable facts

hsk-5vocabularyb2
邀请 (yāoqǐng) — to invite / invitation

HSK 4 | verb / noun | to invite; an invitation

hsk-4vocabularyb1
Attested Sindarin Words

Core list of ~200 most useful attested Sindarin (S.) words — the essential vocabulary every learner needs, drawn from Tolkien's own texts.

sindarinvocabularyattestedtolkien
给 (gěi) — to give; for (someone)

HSK 1 | verb / preposition | means to give or indicates the recipient of an action

hsk-1vocabularya1
話 — JLPT N5 Kanji

話 (wa/hana-su): talk. JLPT N5 kanji.

japanesekanjin5jlpt
CF 455C - Civilization

The graph consists of cities connected by roads. The condition that between any two connected cities there is exactly one simple path means every connected component is a tree. Since the graph may be disconnected, the whole graph is a forest.

codeforcescompetitive-programmingdfs-and-similardpdsuternary-searchtrees
入 — JLPT N5 Kanji

入 (nyuu/ju/i-ru): enter. JLPT N5 kanji.

japanesekanjin5jlpt
Lesson 17: Chinese Media Landscape

Critical analysis of China's media ecosystem — official media, self-media, public opinion dynamics, and the vocabulary of media criticism

hsk-6lessonc1
平台 (píngtái) — platform

HSK 5 | noun | a raised surface or digital/organizational structure enabling activity

hsk-5vocabularyb2
简化 (jiǎnhuà) — to simplify, to streamline

HSK 5 | verb | reduction of complexity while preserving core function

hsk-5vocabularyb2
照顾 (zhàogù) — to take care of

HSK 3 | verb | to look after, take care of, or attend to someone's needs

hsk-3vocabularya2
正确 (zhèngquè) — correct

HSK 3 | adjective | correct, right, accurate — conforming to fact or standard

hsk-3vocabularya2
诞生 (dànshēng) — to be born; birth

HSK 5 | verb / noun | to come into existence; the birth or emergence of something

hsk-5vocabularyb2
JLPT N1 Lesson 5: Four-Character Idioms — 四字熟語

Master the most frequently tested N1 四字熟語, learn how they are formed from classical Chinese and Japanese sources, and use them correctly in formal and literary contexts.

japanesen1lessonjlptyojijukugofour-character idiomskanji
非正式 (fēizhèngshì) — informal; unofficial

HSK 4 | adjective | not formal or official in nature

hsk-4vocabularyb1
成绩 (chéngjì) — achievement; results; grades

HSK 5 | noun | academic grades; results; achievements in work or study

hsk-5vocabularyb2
利益 (lìyì) — interest, benefit

HSK 6 | n | interests, benefits, or gains — especially in political, economic, or social contexts

hsk-6vocabularyc1
持久 (chíjiǔ) — lasting; enduring; sustained

HSK 5 | adjective | lasting; enduring; able to persist over a long time

hsk-5vocabularyb2
改革 (gǎigé) — reform; to reform

HSK 4 | n/v | making changes to improve a system or institution

hsk-4vocabularyb1
印象 (yìnxiàng) — impression

HSK 3 | noun | impression, mental image left by someone or something

hsk-3vocabularya2
耐心 (nàixīn) — patient / patience

HSK 4 | adjective / noun | patient; patience

hsk-4vocabularyb1
有名 (yǒumíng) — famous; well-known

HSK 2 | adjective | describes wide recognition or fame

hsk-2vocabularya1
建议 (jiànyì) — suggestion

HSK 3 | verb / noun | to suggest, recommend; a suggestion or recommendation

hsk-3vocabularya2
上升 (shàngshēng) — to rise; to go up; to ascend

HSK 4 | verb | to move upward in level or amount

hsk-4vocabularyb1
除了 (chúle) — besides; except

HSK 2 | preposition | introduces exceptions or additions; used in 除了...以外/还/都 patterns

hsk-2vocabularya1
通气 (tōngqì) — to ventilate

HSK 7 | verb | mechanical or assisted ventilation of the lungs in critical care settings

hsk-7vocabularyc2
相关 (xiāngguān) — related; relevant; associated

HSK 4 | adjective | having a connection or relationship to the subject at hand

hsk-4vocabularyb1
Supplement 8: Vocabulary — Emotions & Abstract Concepts

Sindarin words for emotions, philosophical concepts, and states of being — including the key philosophical terms estel, amarth, and gûr that Tolkien embedded in his Elvish worldview.

sindarinvocabularyemotionsphilosophyintermediate
振奋 (zhènfèn) — to invigorate; inspiring; uplifting

HSK 5 | verb/adjective | to inspire; to invigorate; filled with excitement and spirit

hsk-5vocabularyb2
排队 (páiduì) — to queue; to line up

HSK 4 | verb | forming an orderly line to wait

hsk-4vocabularyb1
表达 (biǎodá) — to express; to convey

HSK 4 | verb | communicating thoughts, feelings, or ideas

hsk-4vocabularyb1
白 (bái) — white; in vain

HSK 2 | adjective/adverb | the color white; also means without result or free of charge

hsk-2vocabularya1
洪水 (hóngshuǐ) — Flood, floodwater

HSK 5 | noun | an overflow of water onto normally dry land; a flood

hsk-5vocabularyb2
将来 (jiānglái) — future; in the future

HSK 3 | noun/adverb | the future as a time reference, used for goals, hopes, and plans

hsk-3vocabularya2
Supplement 4: Graded Reading Practice

Six graded Sindarin reading passages from beginner to advanced: all fully glossed with word-by-word translation, grammatical notes, and cultural commentary.

sindarinreadingpracticetextsall-levels
平均 (píngjūn) — average; equal; per capita

HSK 3 | adjective/noun/verb | evenly distributed; the statistical mean

hsk-3vocabularya2
哥哥 (gēge) — older brother

HSK 1 | noun | one's elder brother

hsk-1vocabularya1
Learning Roadmap A1 → C2

Step-by-step Esperanto learning roadmap from absolute beginner to complete mastery.

esperantomethodologyroadmapplanschedule
诚实 (chénɡshí) — honest / honesty

HSK 4 | adjective | honest; truthful; sincere

hsk-4vocabularyb1
就此而言 (jiù cǐ ér yán) — in this regard; speaking of this

HSK 5 | phrase | a discourse marker meaning 'with regard to this point'

hsk-5vocabularyb2
心理健康 (xīnlǐ jiànkāng) — mental health

HSK 4 | noun | the state of psychological and emotional wellbeing

hsk-4vocabularyb1
其实 (qíshí) — actually; in fact; as a matter of fact

HSK 3 | adverb | reveals the true situation, often correcting a misconception

hsk-3vocabularya2
密码 (mìmǎ) — password, code

HSK 4 | noun | a secret word or number used for authentication or encryption

hsk-4vocabularyb1
精彩 (jīngcǎi) — wonderful

HSK 3 | adjective | wonderful, brilliant, splendid — describing a superb performance or event

hsk-3vocabularya2
机会 (jīhuì) — opportunity; chance

HSK 4 | noun | a favorable moment or occasion

hsk-4vocabularyb1
Nature & Environment

Esperanto vocabulary for animals, plants, weather, geography, and environmental topics.

esperantovocabularynatureanimalsweatherenvironment
〜からすると / 〜からすれば / 〜からみると — JLPT N2 Grammar

Learn 〜からすると, 〜からすれば, and 〜からみると to express judgments and inferences from a specific perspective or standpoint.

japanesegrammarn2jlpt
Lesson 2: Expert Oral Presentation

Achieving high-level Chinese public speaking: structure, rhetoric, delivery, and audience engagement at the expert level.

hsk-8lessonc2
充足 (chōngzú) — sufficient; adequate; ample

HSK 5 | adjective | sufficient; adequate; ample; plentiful

hsk-5vocabularyb2
相对 (xiāngduì) — relatively; comparatively

HSK 4 | adjective / adverb | relative; in comparison to something else

hsk-4vocabularyb1
Lesson 3: Fear Clauses and Indirect Commands

Learn the counter-intuitive grammar of fear clauses and how Latin reports commands indirectly.

latinintermediatelesson
目的 (mùdì) — purpose; objective; aim

HSK 4 | noun | the purpose, objective, or aim behind an action

hsk-4vocabularyb1
Lesson 11: Advanced Grammar Review

Consolidate and extend understanding of complex Chinese grammatical structures including the 把/被 constructions and noun phrase nominalization.

hsk-5lessonb2
〜とともに — JLPT N3 Grammar

Learn 〜とともに (together with / as ~ also changes) — the N3 pattern for expressing simultaneous co-occurrence and parallel change.

japanesegrammarn3jlpt
地方 (dìfang) — place

HSK 1 | noun | place, location, area (abstract)

hsk-1vocabularya1
加班 (jiābān) — to work overtime; overtime

HSK 3 | verb/noun | working extra hours beyond the normal schedule

hsk-3vocabularya2
CF 475A - Bayan Bus

The bus layout is fixed and already drawn for us. There are 34 passenger seats in total. Passengers always occupy seats in a very specific order: they start from the last row, fill it from left to right, then move upward row by row.

codeforcescompetitive-programmingimplementation
JLPT N1 Lesson 10: N1 Capstone — Full Simulation and Strategic Analysis

Full N1 simulation: 300-char reading passage with 5 questions, 20 grammar questions, 10 vocabulary questions, timing strategy for 170 minutes, pass rate analysis, the top 20 patterns that distinguish N1 from N2, and guidance on study beyond N1.

japanesen1lessonjlptcapstonemock testexam strategypost-N1
水果 (shuǐguǒ) — fruit

HSK 3 | noun | fruit — edible fruit of a plant

hsk-3vocabularya2
吧 (ba) — suggestion and assumption particle

HSK 1 | particle | softens suggestions and expresses tentative assumptions

hsk-1vocabularya1
低碳 (dītàn) — low-carbon

HSK 5 | adjective | low-carbon; producing or emitting less carbon dioxide

hsk-5vocabularyb2
CF 478E - Wavy numbers

We are asked to work with a special class of integers defined purely by their digit structure. A number is called “wavy” if, whenever you look at any digit that is not at the boundary, that digit must sit either strictly above both its neighbors or strictly below both…

codeforcescompetitive-programmingbrute-forcedfs-and-similarmeet-in-the-middlesortings
Lesson 15: A2 Review and Path to B1

Consolidate all A2 grammar, review 150 essential vocabulary words, assess your CEFR A2 competencies, and preview what B1 brings.

esperantoa2lesson
机场 (jīchǎng) — airport

HSK 2 | noun | an airport, aerodrome

hsk-2vocabularya1
报道 (bàodào) — to report; news report

HSK 5 | verb/noun | to report (news); a news report or coverage

hsk-5vocabularyb2
对于 (duìyú) — regarding / as for

HSK 3 | preposition | regarding, as for, with respect to — formal topic introducer

hsk-3vocabularya2
旅游 (lǚyóu) — to travel; tourism

HSK 3 | verb/noun | to travel for leisure; tourism

hsk-3vocabularya2
努力 (nǔlì) — work hard; diligent; effort

HSK 2 | verb / adjective / noun | describes hard work and determined striving

hsk-2vocabularya1
N4 Kanji: 手 (Hand)

JLPT N4 kanji 手 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

japanesen4jlptkanjilanguage-learning
上 — Kanji Reference

上 (up, above): 3 strokes, JLPT N5. On: ジョウ、ショウ. Kun: うえ、うわ、のぼ-る.

japanesekanjin5writing
应该 (yīnggāi) — should; ought to

HSK 3 | modal verb | expressing obligation, expectation, or what is proper

hsk-3vocabularya2
打折 (dǎzhé) — to give a discount

HSK 3 | verb | to discount, to sell at a reduced price

hsk-3vocabularya2
法律 (fǎlǜ) — law, legislation

HSK 4 | n | a system of rules enforced by government

hsk-4vocabularyb1
Lesson 9: Reading Monato — News and Current Affairs Vocabulary

Build the political, economic, and media vocabulary needed to read authentic Esperanto news sources at B2 level.

esperantob2lesson
特别 (tèbié) — Special, especially, particularly

HSK 5 | adjective/adverb | special; out of the ordinary; especially; particularly

hsk-5vocabularyb2
说清楚 (shuō qīngchǔ) — say clearly / explain clearly

HSK 3 | verb + result complement | to express something in a way that is fully understood

hsk-3vocabularya2
构建 (gòujiàn) — to construct, to build

HSK 6 | verb | to deliberately construct or build up a system, framework, or concept

hsk-6vocabularyc1
〜にして (being X and also / at that very point — formal dual)

N1 grammar pattern 〜にして: formal dual predication ('being X and at the same time Y') and the expression of a critical stage ('at that very point of'). Appears in literary and formal contexts.

japanesen1grammarjlptにしてclassical Japanese
假设 (jiǎshè) — to assume, to hypothesize; hypothesis

HSK 6 | verb/noun | to posit a supposition; a scientific or logical hypothesis

hsk-6vocabularyc1
理念 (lǐniàn) — idea, concept, philosophy

HSK 6 | n | a guiding idea, philosophical concept, or core belief underlying a practice or system

hsk-6vocabularyc1
宁可…也不 (nìngkě…yě bù) — Would rather...than

HSK 4 | grammar pattern | expressing strong preference by choosing one thing over another

hsk-4vocabularyb1
向 (xiàng) — toward / facing

HSK 3 | preposition / verb | toward, in the direction of; facing; to face

hsk-3vocabularya2
语言 (yǔyán) — language

HSK 3 | noun | a system of communication used by a group of people

hsk-3vocabularya2
满足 (mǎnzú) — to satisfy / be satisfied

HSK 3 | verb / adjective | to satisfy, to meet a need; to feel satisfied

hsk-3vocabularya2
放弃 (fàngqì) — to give up; to abandon

HSK 4 | verb | to stop pursuing or holding onto something

hsk-4vocabularyb1
机构 (jīgòu) — institution; organization; agency

HSK 4 | noun | an institution, organization, or agency

hsk-4vocabularyb1
Lesson 39: Doriathrin Sindarin

The archaic Doriathrin dialect of Sindarin: features from Tolkien's First Age writings, preserved archaisms, and how Doriathrin differs from Third-Age Sindarin.

sindarindialectsdoriathrinfirst-ageadvanced
新鲜 (xīnxiān) — fresh

HSK 4 | adjective | recently produced or obtained; not stale or decayed

hsk-4vocabularyb1
说 (shuō) — to speak, to say, to tell

HSK 1 | verb | to produce speech or language

hsk-1vocabularya1
确认 (quèrèn) — to confirm; to verify

HSK 5 | verb | to confirm; to acknowledge as correct

hsk-5vocabularyb2
信息 (xìnxī) — information

HSK 3 | noun | information, news, data — any content that informs or communicates

hsk-3vocabularya2
框架 (kuàngjià) — framework, structure

HSK 6 | n | the structural skeleton or conceptual framework of a system, plan, or argument

hsk-6vocabularyc1
声音 (shēngyīn) — sound, voice, noise

HSK 2 | noun | sound, voice, noise

hsk-2vocabularya1