The man again shook his head, for he could not understand or speak his language.

这个人又摇了摇头，因为他不懂也不会说他的语言。

youdao

Someone could not understand them and become very sick or even die.

有些人无法理解他们，并且病情加重甚至死亡。

youdao

Or, the same could happen the other way around: an application might vend data but not understand a messaging system.

同样的事情或者会反过来以其它方式出现：应用可能会发送数据，但并不理解消息系统。

youdao

In a 1986 case it said that prisoners so insane that they could not understand the punishment they were about to suffer or why they were being punished could not be executed.

ECONOMIST: Forcible medication

Their advanced training in accounting and economics allowed them to know things about the markets that common folk like me could not possibly know or understand.

FORBES: Why I Index by Rick Ferri

He could not understand people who made drawers, or any other piece of furniture, with sharp edges.

ECONOMIST: Alan Peters