I fear lest we commit an inexcusable blunder.

我为我们会犯不可原谅的错误而担忧。

youdao

I fear lest in the morning he suddenly come to my door when I have fallen asleep wearied out.

我怕在清晨我正在倦睡的时候，他忽然来到我的门前。

youdao

Pluck this little flower and take, delay not! I fear lest it droop and drop into the dust.

请摘下这朵花把它带走，不要延迟！恐防它凋敝尘土。

youdao

Those who kill journalists must be brought to justice, lest fear paralyze both the media and the ordinary people who rely on professional journalists for the news and analysis that inform their political choice.

UNESCO: MEDIA SERVICES

They cite the examples of pencils for schoolchildren, which were banned lest their leads be turned into weapons, and ambulances, whose delivery was delayed for fear the army might appropriate them.

ECONOMIST: Waiting for the next Iraqi crisis