a no-brainer (一个简单的决定)

Idiom Problem

含义

something that is very easy to understand or decide

非常容易理解或决定的事情 (fei chang rong yi li jie huo jue ding de shi qing)

例句

"The solution to the problem was a no-brainer."

"问题的解决方案是非常简单的。" (Wenti de jiejue fang'an shi feichang jiandan de)