An active and social person likes to be in the swim.

一个活跃的、爱交际的人，喜欢赶潮流。

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He built 17-long pool at the back garden to try to be in the swim.

他在后花园建了一个17米深的池子用来游泳用。

youdao

If you swim in a river or lake, be sure to investigate what is below the water surface.

如果你在河里或者湖里游泳，一定要弄清楚水面下有什么。

youdao

The welcoming pool in which the narcotics tycoons swim must be drained dry.

CNN: TARGET THE BIG FISH

Event bosses have been forced to cancel the Great North Swim in Cumbria after blue-green algae was found in the water which could be dangerous.

BBC: Cumbria Great North Swim cancelled over safety fears

As well as providing food, communication and the occasional excitement when a Colombian gunboat looking for drug smugglers sails by, the river affords the best way to cool off in the heat so long as thoughts of little organisms that swim up the urethra can be set aside.

ECONOMIST: The Amazon's indigenous people