I can't tell my son what to do; it's water off a duck's back with him.

我无法告诉我儿子该做什么，他根本听不进去。

《牛津词典》

An hour later, the son came back with the empty basket and told his father it was impossible to hold water with the basket.

一个小时后，儿子带着空篮子回来了，告诉父亲用篮子装水是不可能的。

youdao

After a while, the son was asked to get some water again by his father.

过了一会儿，父亲又让儿子去打水。

youdao

The primitive fish mouth straining for water and finding it as my son releases it in the shallows.

NEWYORKER: The Other Place

"I answered the call to a man saying he had found his son face down in water, " said Ms Harrison.

BBC: 999 worker helps save Lincolnshire baby's life

It was for Terry Horn, whose home in Broad Channel, an island community in Queens, was flooded with 51 inches of water on its first floor as his son scrambled upstairs with the family's dogs at the height of the storm.

WSJ: NYC post-Sandy home repair program passes 20K mark