If you don't know how to do it, don't fool with it.

你要是不会干就别胡来。

《新英汉大辞典》

She's nobody's fool when it comes to dealing with difficult patients.

她对付难缠的病人很有办法。

《牛津词典》

The person to ask is a magician, somebody whose profession is to fool people and make it look like they can do things with magic.

要问的是魔术师，他们的职业是愚弄别人，让他们看起来好像可以用魔法做事情。

youdao

The person to ask is a magician, somebody whose profession it is to fool people and make it look like they can do things with magic.

你要问的是魔术师,他们的职业就是愚弄别人,让人相信他们有魔法

耶鲁公开课 - 死亡课程节选

So I ask you to support, No. 1, an economic program that saves Social Security first, and don't fool with this balanced budget until we actually achieve it, and that we ought to look at the black ink just for a day or two before we start giving it away...

CNN: Transcript: Clinton's remarks at Orlando fund-raiser

Only a fool tries to reason with the wind hoping to persuade it to blow in another direction.

FORBES: Chronicling The Decline And Fall Of Entitlement Democracy

Now that the reckoning is here, it becomes a little easier to see that we fool ourselves with the apparent cheapness of subsidized oil and that a healthy environment is priceless beyond reckoning.

CNN: We are all Gulf victims now