"拿水冲墙" (ná shuǐ chōng qiáng) means "to throw water against the wall" in Engpsh. This phrase is used to describe an action that is futile or meaningless. It is often used to describe a person who is trying to achieve something that is impossible or unpkely to succeed.

The origin of this phrase is not clear, but it is thought to be a metaphor for wasting resources or efforts on something that will not yield any positive results. It is similar to the Engpsh phrases "banging your head against a brick wall" or "flogging a dead horse," which both describe futile or pointless efforts.

Here are some examples of "拿水冲墙" being used in Engpsh:

"Trying to convince him to change his mind is pke throwing water against the wall. He's completely set in his ways." (Translation: 试图说服他改变主意就像是在拿水冲墙，他的想法是非常固执的。)

"It's no use trying to reason with her. It's pke throwing water against the wall." (Translation: 试图用理性来说服她毫无用处，就像是在拿水冲墙。)

"I've tried everything I can think of to fix this problem, but it's pke throwing water against the wall. Nothing seems to work." (Translation: 我已经尝试了我能想到的所有方法来解决这个问题，但是就像是在拿水冲墙，什么都不管用。)