【俚语】

Tap water 自来水
Running water 自来水

【例句】

People there don’t drink tap water because it’s not fresh.
那里的人不喝自来水，因为不新鲜。

Be in hot water 惹上麻烦

【例句】

I was in hot water last night when Penny found out I went to the movies instead of cleaning out the garage.
昨晚当Jenny发现我没有打扫车库而去看电影时，我就惹上麻烦了。

Make one's mouth water
使（某人）馋得流口水

【例句】

The smell of the grilled chicken made my mouth water.
烤鸡的香味让我垂涎欲滴。

Pour/throw cold water on sth.泼冷水

【例句】

I have lots of ideas about how to improve sales but my manager pours cold water on all of my suggestions.
关于如何提高销售额，我有很多想法，但我的经理对我的所有建议都泼冷水。

Water under the bridge
已成往事

【例句】

That argument we had is just water under the bridge now—don't even worry about it.
我们的争论都是往事了。不必担心。