정의: Morning is either the period from sunrise to noon, or the period from midnight to noon. In the first definition it is preceded by the twilight period of dawn, and there are no exact times for when morning begins because it can vary according to one's latitude, and the hours of daytime at each time of year. However, morning strictly ends at noon, when afternoon starts.
| 핵심 연구 분야 | Infrastructure |
|---|---|
| 주요 연도 | 2022년 |
| 주요 연관 키워드 | urban |
| 좋아요 수 | 0 |