He hurt his hands and couldn't unbutton his coat by himself.

他双手受伤了，无法自己解开上衣扣子。

After being comforted by him, she began to unbutton.

被他安慰过后，她开始放松了。

Unbutton your collar and remove your tie.

解开衣领，摘下领带。

She had begun to unbutton her blouse.

她开始解她衬衫的钮扣。

If you unbutton your collar, remove your tie.

如果你解开领扣，就把领带摘下来。

He started to unbutton his pants.

他开始解裤子上的纽扣。

Please unbutton your coat.

请把您的衣扣解开。

Doctor: Unbutton your shirt, please.

医生：解开你的上衣，请。