sunup

We woke up before sunup to catch the early train.

用法提示：sunup 是名词，表示“日出”，在句中作时间状语。

The farmers start working at sunup every day.

用法提示：sunup 作名词，意为“日出”，与 at 搭配表示时间。

She likes to watch the sky change color at sunup.

用法提示：sunup 是名词，指“黎明”，在句中作时间状语。