scratch

John yawned and scratched his chin.

约翰打个哈欠，挠挠下巴。

She scratched at the insect bites on her arm.

她挠了挠胳膊上虫咬的包。

If you've ever started a sentence with, "If I were you..." or found yourself scratching your head at a colleague's agony over a decision when the answer is crystal-clear, there's a scientific reason behind it.

如果你曾经用“如果我是你的话……”作为一个句子的开头，或者发现自己在为同事因一个决定感到痛苦而挠头，而答案其实清晰明了，这背后有其科学依据。

I'd scratched my leg and it was bleeding.

我把腿抓出了血。

Does the cat scratch?

这只猫抓人吗？

The models couldn't sit in them, and they even got scratched from the plastics under their arms.

模特们不能坐在里面，他们甚至还被胳膊下的塑料划伤了。

They scratched lines in the dirt to mark out a pitch.

他们在地上划出一个球场。

Her dog was scratching at the floor when she came in.

当她进来时，她的狗在抓地板。