정의: Winter is the coldest and darkest season of the year in temperate and polar climates. It occurs after autumn and before spring, when the hemisphere is oriented away from the Sun as a result of the tilt of Earth's axis. Different cultures define different dates as the start of winter, and some use a definition based on weather.
| 핵심 연구 분야 | Verification |
|---|---|
| 주요 연도 | 2020년 |
| 주요 연관 키워드 | 2022 |
| 좋아요 수 | 0 |