现在是伏天，西瓜正当令。

These are the dog days; watermelons are just in season.

《新英汉大辞典》

在三伏天，我除了游泳之外什么也干不了。

I can do nothing except for swimming in dog days.

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三伏天是一年中最热的日子。

The dog days of summer are the hottest days of the year.

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三伏天是夏天中最炎热的日子。

The Dog days are the hottest days in Summer.

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三伏天快要来了，我们最好装一个空调。

The dog days will arrive soon . We had better install an air conditioner.

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三伏天除了游泳我什么都不能做。

I can do nothing except for swimming during the dog days.

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在三伏天人们喜欢待在家里。

People like staying at home during the dog days.

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伏天里，除了游泳，我什么事也做不成。

I can do nothing except for swimming in the dog days.

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因此，从古代起，人们就有了很多三伏天避暑消夏的活动。

Thus, from ancient times, people developed many activities to escape the heat of Dog Days.

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因此，从古代起，人们就有了很多三伏天避暑消夏的活动。

Thus, from ancient times, people developed many activities to escape the heat of Dog Days.

youdao