He was struck with a smart crack on the head.

他头上突然被猛击了一下。

《牛津词典》

She is so smart, everything she says is above my head.

她真聪明，她所说的一切都是我理解不了的。

youdao

Swim smart, use your head, and keep your head still.

勤动脑、保持冷静会使游泳敏捷。

youdao

Swim smart, use your head, and keep your head still.

勤动脑、保持冷静会使游泳敏捷。

youdao