brain
tamnd's digital brain — notes, problems, research
43815 notes
HSK 3 | noun | a regular pattern or rule observed in nature or life
HSK 2 | noun | direction word indicating the right-hand side
HSK 6 | n | the form, configuration, or mode of existence of something; morphology
HSK 2 | time word | refers to a moment in the very recent past; contrast with 刚
Complete guide to all six patterns of the ablative absolute and five strategies for translating it in context.
HSK 5 | discourse marker | in summary, to summarise what has been said above
HSK 5 | adjective/adverb | not influenced by personal feelings; based on observable facts
HSK 4 | verb / noun | to invite; an invitation
Core list of ~200 most useful attested Sindarin (S.) words — the essential vocabulary every learner needs, drawn from Tolkien's own texts.
HSK 1 | verb / preposition | means to give or indicates the recipient of an action
話 (wa/hana-su): talk. JLPT N5 kanji.
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.
入 (nyuu/ju/i-ru): enter. JLPT N5 kanji.
Critical analysis of China's media ecosystem — official media, self-media, public opinion dynamics, and the vocabulary of media criticism
HSK 5 | noun | a raised surface or digital/organizational structure enabling activity
HSK 5 | verb | reduction of complexity while preserving core function
HSK 3 | verb | to look after, take care of, or attend to someone's needs
HSK 3 | adjective | correct, right, accurate — conforming to fact or standard
HSK 5 | verb / noun | to come into existence; the birth or emergence of something
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.
HSK 4 | adjective | not formal or official in nature
HSK 5 | noun | academic grades; results; achievements in work or study
HSK 6 | n | interests, benefits, or gains — especially in political, economic, or social contexts
HSK 5 | adjective | lasting; enduring; able to persist over a long time
HSK 4 | n/v | making changes to improve a system or institution
HSK 3 | noun | impression, mental image left by someone or something
HSK 4 | adjective / noun | patient; patience
HSK 2 | adjective | describes wide recognition or fame
HSK 3 | verb / noun | to suggest, recommend; a suggestion or recommendation
HSK 4 | verb | to move upward in level or amount
HSK 2 | preposition | introduces exceptions or additions; used in 除了...以外/还/都 patterns
HSK 7 | verb | mechanical or assisted ventilation of the lungs in critical care settings
HSK 4 | adjective | having a connection or relationship to the subject at hand
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.
HSK 5 | verb/adjective | to inspire; to invigorate; filled with excitement and spirit
HSK 4 | verb | forming an orderly line to wait
HSK 4 | verb | communicating thoughts, feelings, or ideas
HSK 2 | adjective/adverb | the color white; also means without result or free of charge
HSK 5 | noun | an overflow of water onto normally dry land; a flood
HSK 3 | noun/adverb | the future as a time reference, used for goals, hopes, and plans
Six graded Sindarin reading passages from beginner to advanced: all fully glossed with word-by-word translation, grammatical notes, and cultural commentary.
HSK 3 | adjective/noun/verb | evenly distributed; the statistical mean
HSK 1 | noun | one's elder brother
Step-by-step Esperanto learning roadmap from absolute beginner to complete mastery.
HSK 4 | adjective | honest; truthful; sincere
HSK 5 | phrase | a discourse marker meaning 'with regard to this point'
HSK 4 | noun | the state of psychological and emotional wellbeing
HSK 3 | adverb | reveals the true situation, often correcting a misconception
HSK 4 | noun | a secret word or number used for authentication or encryption
HSK 3 | adjective | wonderful, brilliant, splendid — describing a superb performance or event
HSK 4 | noun | a favorable moment or occasion
Esperanto vocabulary for animals, plants, weather, geography, and environmental topics.
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.
Achieving high-level Chinese public speaking: structure, rhetoric, delivery, and audience engagement at the expert level.
HSK 5 | adjective | sufficient; adequate; ample; plentiful
HSK 4 | adjective / adverb | relative; in comparison to something else
Learn the counter-intuitive grammar of fear clauses and how Latin reports commands indirectly.
HSK 4 | noun | the purpose, objective, or aim behind an action
Consolidate and extend understanding of complex Chinese grammatical structures including the 把/被 constructions and noun phrase nominalization.
Learn 〜とともに (together with / as ~ also changes) — the N3 pattern for expressing simultaneous co-occurrence and parallel change.
HSK 1 | noun | place, location, area (abstract)
HSK 3 | verb/noun | working extra hours beyond the normal schedule
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.
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.
HSK 3 | noun | fruit — edible fruit of a plant
HSK 1 | particle | softens suggestions and expresses tentative assumptions
HSK 5 | adjective | low-carbon; producing or emitting less carbon dioxide
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…
Consolidate all A2 grammar, review 150 essential vocabulary words, assess your CEFR A2 competencies, and preview what B1 brings.
HSK 2 | noun | an airport, aerodrome
HSK 5 | verb/noun | to report (news); a news report or coverage
HSK 3 | preposition | regarding, as for, with respect to — formal topic introducer
HSK 3 | verb/noun | to travel for leisure; tourism
HSK 2 | verb / adjective / noun | describes hard work and determined striving
JLPT N4 kanji 手 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
上 (up, above): 3 strokes, JLPT N5. On: ジョウ、ショウ. Kun: うえ、うわ、のぼ-る.
HSK 3 | modal verb | expressing obligation, expectation, or what is proper
HSK 3 | verb | to discount, to sell at a reduced price
HSK 4 | n | a system of rules enforced by government
Build the political, economic, and media vocabulary needed to read authentic Esperanto news sources at B2 level.
HSK 5 | adjective/adverb | special; out of the ordinary; especially; particularly
HSK 3 | verb + result complement | to express something in a way that is fully understood
HSK 6 | verb | to deliberately construct or build up a system, framework, or concept
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.
HSK 6 | verb/noun | to posit a supposition; a scientific or logical hypothesis
HSK 6 | n | a guiding idea, philosophical concept, or core belief underlying a practice or system
HSK 4 | grammar pattern | expressing strong preference by choosing one thing over another
HSK 3 | preposition / verb | toward, in the direction of; facing; to face
HSK 3 | noun | a system of communication used by a group of people
HSK 3 | verb / adjective | to satisfy, to meet a need; to feel satisfied
HSK 4 | verb | to stop pursuing or holding onto something
HSK 4 | noun | an institution, organization, or agency
The archaic Doriathrin dialect of Sindarin: features from Tolkien's First Age writings, preserved archaisms, and how Doriathrin differs from Third-Age Sindarin.
HSK 4 | adjective | recently produced or obtained; not stale or decayed
HSK 1 | verb | to produce speech or language
HSK 5 | verb | to confirm; to acknowledge as correct
HSK 3 | noun | information, news, data — any content that informs or communicates
HSK 6 | n | the structural skeleton or conceptual framework of a system, plan, or argument
HSK 2 | noun | sound, voice, noise