When you gaze up at the stars at night, you are looking into the unblinking eyes of elephants, who sleep with one eye open, to best keep watch over us.

当你凝视夜空星斗，你都能看到不闭眼的象群，酣眠时睁开一只眼睛，好好的照看我们。

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Love not sleep, lest thou come to poverty; open thine eyes, and thou shalt be satisfied with bread.

不要贪睡，免致贫穷。眼要睁开，你就吃饱。

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Snakes can see through their eyelids. This is why they usually sleep in very dark places, but they still tend to sleep with their eyes open.

蛇能透过眼皮看到东西。这就是为什么它们通常会睡在黑暗的地方，不过它们睡觉时通常是睁着眼睛的。

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