昨夜我很晚才就寝，错过了上半夜的睡眠。

I went to bed late last night and missed my beauty sleep.

从22,000只鸟的身上采集到的数据发现，它们潜水捕食大多深入到水下50 - 100米，那里已经相当暗了，像上半夜一样。

Data collected on nearly 22,000 of the birds' foraging dives showed that most were hunting prey at 50 to 100 meters below the surface, where the water is quite dark-akin to early night.