He's a brain, who wouldn't be fooled into believing your babbling.

他可是个有头脑的人，决不会相信你的那一套。

4.很能干 to have a lot on the ball

I know Li Ming has a lot on the ball. But I'm not sure if he likes to work here.

我知道李明很能干，但我怀疑他是否真的愿意到我们这儿来工作。