The stars you see at night are the unblinking eyes of sleeping elephants, who sleep with one eye open to best keep watch over us.

你看到的那些夜晚的星星，就是不眨眼睡觉的大象的眼睛，他们边睡边睁着一只眼睛尽力看护我们。

youdao

Ennis rode easy, sleeping with his eyes open, but the hours he was away from the sheep stretched out and out.

埃尼斯骑马的时候很潇洒，睡觉的时候都睁着眼，可他离开羊群的时间却越拉越长。

youdao

For the most boring of the sleep inducing variety I think church services win hands down, but on the other hand it is a good place to practice sleeping with one's eyes open, a useful skill for judges and politicians.

BBC: News | UK | Where is the most boring place on earth? Your reaction