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1·Do I need to be available twenty four hours a day?

我真的需要每天24小时随叫随到吗？

2·Give yourself twenty four hours before making the purchase.

在做出购买决定之前给你自己24小时。

3·While there may only be twenty four hours in the day, your capacity for energy isn’t a fixed quantity.

尽管一天只要24小时，但你的精力却不是固定的。

4·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。

5·Whales take twenty-four hours to copulate.

鲸用二十四小时来交配。《柯林斯英汉双解大词典》

6·They have extended the deadline by twenty-four hours.

他们已经将最后期限延长了24小时。《柯林斯英汉双解大词典》

7·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。《柯林斯英汉双解大词典》

8·Miss Pearce said she expected an unqualified retraction of his comments within twenty-four hours.

皮尔斯小姐称她希望他在24小时内无条件收回他的言论。《柯林斯英汉双解大词典》

9·This money fed and sheltered me twenty-four hours.

这些钱养活了我，并为我提供了24小时的庇护。

10·I spent twenty-four hours a week developing my skills.

我每周花24小时来提升我的技能。