If it's illegal for someone under 21 to drink, it should be illegal for them to drink and drive. That's a no-brainer.

如果不满21岁喝酒是违法的，那他们酒后驾车也应是违法的。这太容易理解了。

《柯林斯英汉双解大词典》

Is proposal of marriage a no-brainer?

求婚是件很简单的事吗？

youdao

This one is a no brainer.

这是一个不用动脑子的方法。

youdao

And then I said, 'It's a no brainer.

VOA: standard.2010.06.24

It seems like a no-brainer to bring these peoples in to help Afghnastan.

把这些人引进到阿富汗看起来是非常容易的事。

普林斯顿公开课 - 国际座谈会课程节选

Yeah, I think that mandatory voting is a no-brainer. It's a dumb idea. It's a terrible idea.

我认为强制投票这事不用多考虑，是一个极其愚蠢，极其糟糕的想法。

对于义务投票制 - SpeakingMax英语口语达人

These kinds of figures can make BYOD seem almost a no brainer for businesses.

FORBES: Calculating The True Cost Of BYOD

When the time came to give back to the community, it was a no brainer.

FORBES: The Path to Eco-Responsibility is Easier with Free Beer

Both of these companies have done dumber things, but this just seems like a no-brainer.

FORBES: Prediction: Neither Xbox 'Durango' nor PS4 Will Block Used Games