Why not have a day off? I'll hold the fort for you.

干吗不休息一天？我来为你代管。

《牛津词典》

Why not have some dessert?

为何不吃些甜点呢？

youdao

Why not have a turkey and peanut butter sandwich?

为什么不吃火鸡和花生酱三明治？

youdao

"I saw all these ships waiting out there,I am guessing, waiting their turns to load and unload the cargo, so,I said,Why do the ships come into the harbor?" Why not have the harbor go out there and bring the goods in?'" Researchers describe the mobile harbor as a lean, light system for unloading container ships even if the coastal area is too shallow for them to dock.

VOA: standard.2010.01.04

Usually when you know why it's not working, it's obvious what you have to do to make it work.

通常你明白了出错的原因后，很明显你必须让程序正常运行起来。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, hedge funds do not advertise, that's why people don't know about them and they have a mysterious -they sound mysterious.

对冲基金公司做不了广告,那也是公众并不了解他们的原因,他们披着一层神秘的面纱...,他们听起来挺神秘的

耶鲁公开课 - 金融市场课程节选

Why not have the IRS tell us whether higher education is connected to higher incomes?

FORBES: Dollars and Diplomas

For example, why not have a scholar of international relations, perhaps Walt even, on the commission?

FORBES: These Aren't The Objective Cybersecurity Commission Members You're Looking For

Instead, why not have customers call Dell every time they need to do something with the machines?

FORBES: The Second Coming