They watered down the soup to make it go further.

他们在汤里掺水，好让更多的人喝。

Proposed legislation affecting bird-keepers has been watered down.

事关养鸟人的立法提案已作了缓和修改。

The story has been watered down.

这故事的生动性被冲淡了。

The milk has been watered down.

这牛奶被搀水稀释了。

Oh sure, it's been watered down over the years.

当然，这些年来它已经被掺水了。