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HSK 5 | noun phrase | the practice of protecting and preserving the natural environment

HSK 5 | adjective | free from corruption; upright and honest in one's conduct

HSK 5 | noun | available freshwater supplies for human and ecological use

HSK 5 | adjective | considering only one aspect; partial; one-sided

Consolidate all A1+ grammar patterns and the most important HSK 2 vocabulary through integrated exercises and review.

HSK 4 | verb | to disappear or vanish from sight or existence

HSK 5 | noun | duty; obligation; obligatory service

HSK 5 | noun | surgical operation; medical procedure involving cutting

Learn to express two actions happening at the same time using 一边...一边, 边...边, and 同时, with attention to which verbs can combine.

HSK 6 | verb | to test and confirm the truth or validity of something

HSK 3 | noun/verb | personal experience gained through living

HSK 3 | verb | to discover, find, or realize something previously unknown

HSK 5 | verb/noun | to authorize; to grant authority or permission

HSK 5 | noun | a subject or theme being talked about

HSK 5 | adjective/verb | severely insufficient in supply; a state of dire shortage

HSK 3 | noun | opinion, view, feedback — what someone thinks about something

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

HSK 1 | adjective | old (of people), elderly, experienced

Learn 〜ずにはいられない to express irresistible inner compulsion — you cannot help but do or feel something.

HSK 1 | preposition | indicates the starting point of movement, time, or origin

N1 grammar pattern 〜ならでは: expressing exclusivity — something only possible with X, uniquely characteristic of X.

Learn 〜とたんに (the moment ~, just as ~) — the N3 pattern for instantaneous, unexpected change immediately following an action.

HSK 3 | noun / verb | a link between people or things; also in set phrases

HSK 4 | conjunction | adding a reinforcing reason or point

Learn 〜にほかならない (nothing other than ~, precisely ~) — the N3 pattern for making emphatic, exclusive identifications or assertions.

HSK 1 | noun | supermarket

HSK 2 | adverb | marks a habitual or characteristic action

HSK 4 | noun | the global network connecting computers worldwide

HSK 1 | noun | newspaper

HSK 3 | noun | machine, apparatus, device

HSK 2 | verb/noun | to assist someone; the act of assistance

HSK 4 | verb / noun | to think deeply; to ponder; reflection

HSK 5 | noun | the exclusive legal right to reproduce, publish, and sell creative work

HSK 3 | noun | a country other than one's own

HSK 7 | verb | clinical determination of a disease or condition based on systematic examination

HSK 3 | noun | magazine, periodical journal

HSK 1 | adjective | beautiful, pretty, usually describing people

HSK 4 | verb / noun | having an effect on something or someone

HSK 4 | verb | accepting or confirming a fact, mistake, or status

HSK 5 | verb / noun | systematic long-term planning or a plan

HSK 4 | noun | a fundamental belief or rule guiding behavior

HSK 4 | noun | the ability to produce original and imaginative ideas

HSK 3 | verb | to cry; to weep; to shed tears

HSK 5 | noun | honesty and trustworthiness; acting in good faith

HSK 3 | noun | guest, visitor — someone who visits your home or a business

HSK 5 | noun | evidence or grounds used to support an argument

HSK 3 | noun | a fundamental rule or standard guiding behavior

HSK 1 | verb | expresses desire, thought, and longing

HSK 3 | noun | belly, stomach, abdomen (colloquial)

HSK 3 | noun | the global internet network

HSK 3 | adverb | introduces a result that is the opposite of what was expected or intended

HSK 5 | noun | underlying operational mechanism or systemic process

We roll a fair die with faces numbered from 1 to m, exactly n times. Every roll is independent, and each face appears with probability 1 / m. Among those n rolls, we look only at the largest value that appeared. The task is to compute the expected value of that maximum.

HSK 5 | conjunction | and therefore, thus, and as a result

HSK 3 | verb | to obtain or achieve something through effort

はっきり (はっきり / hakkiri): clearly. N4 level Japanese vocabulary.

HSK 3 | adjective | serious, earnest, conscientious, diligent — describes a careful and dedicated attitude

HSK 3 | verb | to borrow something from or lend something to someone

HSK 3 | verb / noun | keeping someone or something safe from harm

Master the art of expressing desires, making suggestions, and articulating your future intentions in Japanese.

HSK 3 | verb | to help, to give assistance — verb-object compound, can be split

HSK 3 | verb | to oppose, to object to, to be against

HSK 5 | noun | the percentage charged or paid for the use of money over a period of time

HSK 3 | noun | the nose; the organ of smell on the face

HSK 2 | adverb | together, at the same time, jointly

HSK 3 | noun | gift, present — something given to someone as a gesture of affection or celebration

HSK 5 | verb | to adapt oneself or something to new conditions or requirements

HSK 4 | phrase | formal phrase to introduce a summary or conclusion

HSK 5 | noun | code; source code; programming code

Sindarin prepositions and the mutations they trigger — with worked examples and definite preposition forms.

HSK 4 | noun/adjective | the record of past events or something relating to the past

HSK 4 | adjective / adverb | direct, without intermediary; straightforwardly

N1 grammar pattern 〜に値する/〜に値しない: expressing that something merits/deserves X (positive evaluation) or does not merit/deserve X.

HSK 4 | adverb | indicating something happened in the past but no longer continues

HSK 3 | adjective/adverb | nearly equal or approximately

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

HSK 3 | verb / noun | to demonstrate something is true; a document serving as evidence

HSK 4 | noun | designer; architect

女 (woman, female): 3 strokes, JLPT N5. On: ジョ、ニョ. Kun: おんな、め.

Complete guide to on'yomi (Chinese-derived readings) and kun'yomi (native Japanese readings): when to use each, patterns, irregular readings, and examples.

HSK 1 | noun | classmate, schoolmate

HSK 6 | conj | used to add a further reason or consideration, strengthening a previous point

HSK 4 | noun | the spot or role something or someone occupies

HSK 2 | verb | to become sick, to fall ill

Mastering Chinese medical register: clinical documentation, patient communication, and biomedical discourse.

HSK 3 | verb | to pick up a person, answer a call, or receive something

HSK 4 | noun / adjective | the system of production and consumption, or economical/thrifty

HSK 4 | adjective / verb | lively, active, or to make something more vibrant

We have a one-dimensional sheet of paper represented as an array of width n. Appleman can fold the sheet at a position p, which means the left segment [0, p) flips and lies over the right segment [p, currentwidth).

HSK 3 | noun | photograph, picture taken by a camera

HSK 4 | noun | a person who shares in a business venture or partnership

Structures and vocabulary for Chinese literary criticism — 以...为..., 体现了...精神, and the discourse of thematic and symbolic analysis

Sindarin nouns: i-affection plural formation, the definite article, direct object marking, and the genitive construction.

HSK 4 | noun | distinguishing feature or characteristic

HSK 4 | noun | the ability or capacity to compete effectively

HSK 4 | noun | a consistent pattern or natural law governing events

We start with a connected undirected graph. Every edge must be assigned a direction. After all directions are chosen, some ordered pairs of vertices $(u,v)$ will satisfy that there is a directed path from $u$ to $v$. The goal is not to make the graph strongly connected.

HSK 7 | verb | surgical removal of tissue, an organ, or a lesion from the body

HSK 5 | adjective | appropriate; suitable; fitting for the context