급락

The place, person, or thing from which something comes or can be obtained.

Published materials such as books, documents, or research papers used for study or research.

A mutual or reciprocal relationship between two or more people, things, or phenomena.

A mark or grade given to a student based on their performance in an exam or course; the result of an effort or performance.

The act of conveying thoughts, feelings, or ideas through language, art, facial expressions, or actions.

To organize or build something again, often in a new or improved way, based on new information or a different perspective.

A way of dealing with something or a methodology used to address a problem. It is common in research to describe the specific angle or method used.

The main subject that is being discussed or described in a piece of writing, a movie, or a conversation.

A research method used for collecting data from a predefined group of respondents to gain information and insights into various topics of interest.

The quality of being worthy of attention; importance, significance, or the true meaning of an action or event.