복습하다

A stock or supply of money, materials, staff, and other assets that can be drawn on by a person or organization in order to function effectively. Often refers to natural or human resources.

The state of being diverse; variety. It often refers to cultural, biological, or ideological differences within a group or system.

The process of developing or being developed. It refers to progress in technology, economy, society, or personal skills.

A person or thing that gives rise to an action, phenomenon, or condition. It is the starting point in a causal chain.

A distinctive attribute or aspect of something. It helps to differentiate one thing from another.

The process of receiving or giving systematic instruction, especially at a school or university. It covers a wide range of learning activities.

The state or quality of being needed or necessary. It is used to justify why a certain action, policy, or research should be undertaken.

The available body of facts or information indicating whether a belief or proposition is true or valid.

Absolutely necessary; extremely important or required.

The systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.