brain
tamnd's digital brain — notes, problems, research
43815 notes
HSK 3 | adjective/noun | relating to the present era
HSK 6 | n | the situational, cultural, or linguistic context in which a word or utterance occurs
HSK 3 | noun | city, urban area — a large, populated urban settlement
HSK 5 | conjunction/adverb | on one hand; in one respect
HSK 4 | noun | a theory or theoretical framework
N1 grammar pattern 〜まじき: a literary/formal adjectival form meaning 'unworthy of, should not, inexcusable for' — expressing strong moral condemnation.
Learn how potential complements with 得 and 不 express ability or possibility, one of the most productive grammatical patterns in Mandarin.
HSK 4 | noun | a large populated urban settlement
HSK 3 | noun | an airport; the facility where aircraft take off and land
HSK 4 | verb | to refer to something briefly in speech or writing
HSK 5 | adverb/conjunction | used to introduce an extreme or surprising case
HSK 2 | noun | a favorable moment or circumstance to do something
HSK 4 | noun | the series of steps or stages in completing something
HSK 5 | verb/noun | to treat an illness; medical treatment
HSK 6 | verb | to provide a brief but comprehensive overview of a topic
HSK 2 | modal verb | expressing permission or general possibility; contrast with 能 for ability
HSK 1 | measure word | classifier for bottled items
〜らしい: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.
HSK 1 | noun | clothes, clothing, garment
We have two walls represented by sequences of tower heights. The bears' wall contains n towers, while Horace's wall contains w towers. Horace is allowed to shift his entire wall vertically by any amount.
Decode formal newspaper Japanese at N3 level: headline omission rules, passive constructions, nominalization, 〜により/〜として in formal writing, number expressions, and analysis of real-style article sentences.
学 (gaku/mana-bu): study. JLPT N5 kanji.
HSK 5 | verb/noun | to assign resources, tasks, or roles according to a plan
HSK 3 | verb | to express, to indicate, to show; to mean, to represent
HSK 3 | preposition | expressing purpose or goal
HSK 3 | conjunction | no matter, regardless of — always paired with 都 or 也
HSK 3 | verb | to hold the opinion that; to consider; used to state personal views
Master five more classical Chinese idioms, focusing on cautionary tales, irony, and the use of idiomatic variation in context.
HSK 1 | measure word | classifier for bound volumes
HSK 5 | noun | a favorable juncture of circumstances; a golden chance
HSK 1 | noun | watermelon
HSK 1 | noun/measure word | used to tell clock time; also means 'a little' or 'dot/point'
HSK 5 | noun | stock, share, equity security traded on a stock market
HSK 4 | conjunction | accepting a premise and drawing a conclusion
Discuss health and medical topics using advanced 被 constructions and 受 + emotional/physical state at B1 level.
HSK 5 | verb / noun | to weaken or deteriorate; a period of decline
HSK 3 | adjective | visually attractive; beautiful; well done
HSK 5 | noun/verb | to test or examine; a test or trial
HSK 4 | verb/noun | to commit money or resources in expectation of future returns
We have a vector of energies indexed by all bitmasks of length m. Since n = 2^m, every vertex can be identified with an m-bit number. One transformation step is linear.
HSK 4 | noun | the monetary or intrinsic worth of something
HSK 2 | measure word/noun | the metric unit of weight equal to one kilogram
HSK 3 | verb / noun | to make a decision; a decision
HSK 4 | adjective | produced without synthetic chemicals; relating to organic chemistry
HSK 2 | adverb | introduces a correction or revelation, contrasting with what was assumed
日 (nichi/jitsu/hi): sun. JLPT N5 kanji.
HSK 4 | noun | a legally binding written agreement between parties
HSK 2 | measure word / adjective | counts items that come in pairs
HSK 1 | adjective | small, little, young
書 (write): 10 strokes, JLPT N5. On: ショ. Kun: か-く.
HSK 4 | verb / noun | using existing material as a guide or source
HSK 4 | adjective | hypocritical; false; insincere
聞 (hear, ask): 14 strokes, JLPT N5. On: ブン、モン. Kun: き-く、き-こえる.
図 (zu/to/haka-ru): map. JLPT N5 kanji.
新 (new): 13 strokes, JLPT N5. On: シン. Kun: あたら-しい、あら-た、にい.
HSK 5 | verb/noun | to propose a course of action; a proposal or recommendation
HSK 6 | n | facts, examples, or reasoning used to support an argument
Two-termination, three-termination, and one-termination 3rd-declension adjectives, with the -ī/-e ablative distinction and the -ium genitive plural rule.
HSK 5 | phrase | a fixed expression introducing a comparative contrast
Learn 〜ようにする (try to ensure, make a point of doing) — the N3 pattern for expressing sustained, deliberate effort to create or maintain a habit.
HSK 1 | noun | tea
HSK 2 | adverb | restricts scope to nothing more than what follows
Master the two types of Japanese adjectives to describe people, places, and things with precision and natural flair.
Learn color vocabulary and how Esperanto adjectives work, including the productive mal- prefix for expressing opposites.
HSK 2 | preposition/verb | comparison marker; A比B + adj structure
N1 grammar pattern 〜とあれば: expressing strong motivation or justification — 'if it is for ~, given that ~, should it be the case that ~.'
JLPT N4 kanji 風 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
HSK 3 | adverb | after much effort or trouble; not easy at all to achieve
HSK 3 | noun | arm, the upper limb from shoulder to wrist
HSK 4 | adjective | covering all aspects without leaving anything out
HSK 1 | noun | the early part of the day, from dawn to around 9 a.m.
HSK 3 | verb | to restore something broken to working order
HSK 5 | noun | the release of carbon dioxide into the atmosphere from human activities
HSK 1 | conjunction | connects nouns or noun phrases
HSK 4 | verb/noun | using words to portray something in detail
Codeforces 465A: inc ARG
HSK 4 | adjective | within the expected or standard range
Learn 〜ものがある (there is something ~ about it, it has a certain quality) — the N3 pattern for expressing an indefinable or deeply felt quality.
Learn how to use 〜てたまらない (te tamaranai) to express unbearable or overwhelming feelings, sensations, or desires — 'can't stand ~; unbearably ~.' Includes structure, nuance, examples, and comparisons.
HSK 5 | noun | the ability to produce original and imaginative ideas or works
HSK 4 | noun | the display surface of a device such as a phone, computer, or TV
Learn 〜に応じて (in response to, depending on, adapted to) — the N3 pattern for expressing deliberate, appropriate adaptation to conditions or needs.
HSK 3 | verb | to convey thoughts or feelings
HSK 2 | verb + result complement | indicates the action of listening results in actually hearing
HSK 1 | pronoun | third-person plural pronoun (all-female group)
HSK 5 | adjective/verb | mature; ripe; fully developed (of people, ideas, or fruit)
Chinese and Western cultural frameworks compared — Confucianism, Daoism, Buddhism, and Western values in analytical discourse at C1 level
HSK 6 | n | the overall pattern, configuration, or situation of affairs; a person's breadth of vision
HSK 7 | verb | formal medical term for applying therapeutic intervention to a patient
We are given a collection of parcels, each arriving at a specific time and leaving at another specific time. Each parcel carries a weight, a strength, and a value.
HSK 3 | adj/verb | plentiful in quantity or variety
HSK 1 | greeting phrase | standard response to 你好吗
JLPT N4 kanji 寒 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
HSK 5 | verb | to be the first to establish or bring something into existence
Learn to describe personality and character using degree complements, the 极了 intensifier, and a rich set of adjectives for temperament and behavior.
HSK 1 | adjective | cute, adorable, lovable
HSK 4 | noun | a person who conducts research
HSK 5 | verb/noun | biological or natural evolution and development
HSK 2 | adverb | expresses that something is obvious or goes without saying
HSK 3 | verb | to review or revise material already studied, especially before an exam