关键

Lasting for only a limited period of time; not permanent. It can function as an adjective or an adverb.

Used to single out one person, thing, or situation as being more important or notable than others. It is similar to 'especially' or 'particularly'.

Used to emphasize something surprising or extreme. It marks a higher degree of a quality or situation, often translated as 'even' or 'so much so that'.

Free from outside control; not depending on another's authority. Also describes the ability to think or act for oneself.

To come into possession of; to get or acquire something, often through effort or as a result of a process.

Happening or occurring often; frequent.

A thing that blocks one's way or prevents or hinders progress; barrier.

To be the parts that form something; to make up or constitute.

Small individual facts, features, or items. In an academic context, it refers to specific evidence used to support a main point.

Representing the most common or important characteristics of a group or category; a perfect example of something.