Phrase

first light

/fəːst lait/

noun

黎明,尤指天刚亮的时候

1.
The time when light first appears in the morning; dawn, especially the start of dawn.
黎明,尤指天刚亮的时候
2.
The first use of a telescope or other instrument to capture an astronomical image.
望远镜或其他仪器首次用于获取天文图像。

望远镜或其他仪器首次用于获取天文图像。；黎明；破晓

In use

The fishermen set out to sea at first light.

渔民们在黎明时分出海。

We woke up before first light to watch the sunrise.

我们在天亮前起床看日出。

The birds began singing at first light.

鸟在破晓时开始歌唱。

We set sail at first light.

我们在黎明时起航。

强调在黎明时或之前完成某事。

They had reached the summit by first light.

他们在黎明前已到达山顶。

first light 作主语，常与 reveal, bring 等动词连用。

First light revealed a beautiful landscape.

黎明展现出一片美丽的景色。

dawn: 黎明 · dawn 强调天刚亮的那段时期，而 first light 特指光线初次出现的瞬间
daybreak: 破晓 · daybreak 与 first light 几乎同义，但 daybreak 更常用作名词指白天的开始，first light 则侧重光线的首次显现

Dictionary facts from ECDICT, WIKTIONARY.