俾斯麦号现在只能慢速前进，而全体船员也早已筋疲力尽，悲观失望，完全失去信心。

The Bismarck could now move only at a crawl and her crew were exhausted, hopeless, and utterly demoralized.

《柯林斯英汉双解大词典》

股票市场崩盘后他完全失去理智。

He completely lost his head after the stock market crashed.

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但是他还没有完全失去希望。

But he had not lost all hope.

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On the other hand, the critic Michael Wood has pointed out that Nabokov didn't lose Russian. He didn't lose it on the way while he was riding the boat; he decided to stop writing in it.

另一方面，批评家，迈克尔·伍德指出,纳博科夫没有完全失去俄语，当他划船的时候,他意识到这点，他决定停止写作。

耶鲁公开课 - 1945年后的美国小说课程节选

I lose my interest in philosophy and take up an interest in, I don't know,something that completely doesn't-- organic chemistry holds no interest to me whatsoever.

我失去了对哲学的兴趣，对一个完全不相干的东西-,比如以前完全不感兴趣的有机化学。

耶鲁公开课 - 死亡课程节选