As far as I'm concerned, outlook really matters because if a person looks untidy, no one would like to make friends with him, let alone to know about him.

在我看来，外表很重要，因为如果一个人看上去很邋遢，没有人会愿意和他交朋友，更别说了解他了。

youdao

Knowing how to track and record your expenses and income is important just to survive, let alone to thrive.

知道如何跟踪和记录你的开支和收入对于生存很重要。

youdao

As a reporter in the 1990s she found people in the villages incurious, mute, reluctant to acknowledge the presence of a woman, let alone to answer her questions.

作为一名九十年代的记者，她发现在农村，人们对出现一个女人的反应是漠不关心、沉默和不愿意做出反应，更不用说回答她的问题了。

youdao

Those who have been bereaved cannot be expected to forget, let alone forgive.

VOA: standard.2009.08.24

So you have to admit in fact it was surprising if only 1/4 teenager girls that everybody ask on the date by someone they don't like to go out with, let alone has been some sexual harassment, or sexual molestation, or sexual stocking, which was the lover of language that was used mostly in the media in reporting them.

因此你不得不承认，事实上这件事情令人惊讶,如果只有1/4的女孩子,被她们不想一起出去的人,邀请外出约会，那更不必说那些受到性骚扰，性侵犯和性跟踪的人，其实不过是过于咬文嚼字,正如媒体报道这些事情的时候所用的字眼一样。

麻省理工公开课 - 媒体、教育、市场课程节选

To figure out even what this thing is, let alone how to use it properly. So, you know, I'm sympathetic.

就连认出这是什么东西（都很困难），更别说正确应用它了，所以我很同情这点。

经常犯的失误 - SpeakingMax英语口语达人

Governments have been reluctant to criticise each other in public, let alone to mete out fines.

ECONOMIST: Charlemagne

Without long-term, paid-up capital, it is hard to write multi-year policies, let alone to organise insurance-backed bond issues or derivatives.

ECONOMIST: Lloyd��s of London

It takes unusual leadership qualities to get European countries to agree to anything, let alone to act beyond their national interests.

ECONOMIST: Nicolas Sarkozy