志愿

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.

The process or a period of changing from one state or condition to another; to make such a change.

Used to show that a number or amount is not exact; approximately.

To fill or use a space, an amount of time, or a particular position/proportion.

Most important or basic; of the first importance.

To involve or implicate something or someone in a situation, often a complicated or negative one. It describes the connection or impact between different factors.