Whales take twenty-four hours to copulate.

鲸用二十四小时来交配。

The application must be made within twenty-four hours, or it will not be attended to.

申请必须在二十四小时内办理，否则不予受理。

In the meantime, he began to feel hungry, for it was twenty-four hours since he had eaten.

与此同时，他觉得饿了，因为他已经二十四小时没有吃东西了。

They have extended the deadline by twenty-four hours.

他们已经将最后期限延长了24小时。

The Egyptians probably measured their day in twenty-four hours of unequal length.

埃及人很可能用不同长度的24小时来计量他们的一天。