If you do what she tells you, you won't go far wrong.

你要是按照她说的做，就不会出大差错。

《牛津词典》

"If you go talk to a farmer about Marxism or Leninism, he won't know what you're talking about," he said.

吴协恩说：“如何你对一个农民说马克思或列宁，他们根本不知道你在说什么。”

youdao

If you don't give your mind something to go after, it won't know what to do.

如果你不给它一个目标，它就不知道要做什么。

youdao

So we think this is a fair deal because what is says is you won't go bankrupt if you decide to go to college, but what it also says is you can make the choice for the lower salary but greater fulfillment, greater satisfaction pursuing your passion -- you can do that and it's not going to be cost-prohibitive.

WHITEHOUSE: President Obama Holds a Town Hall in New Hampshire