let alone

基本解釋

The country does not yet have enough electricity for itself, let alone for export.
但是這個(gè)國(guó)家的電量連自己都不夠用，更別說(shuō)是用來(lái)出口了。
Anxiety born in human genes is well enough to give people a hard time, let alone the lifelong anxiety caused by death. It is said that this innate anxiety disorder doesnot only affect humans.
就不用說(shuō)死亡能讓我們一生焦慮了，人類基因中自身攜帶的焦慮就足以讓人們焦頭爛額了，這種與生俱來(lái)的焦慮癥候據(jù)說(shuō)竝不是人類的專利。
Within the state of Queensland itself there were differences in performance, even before the floods, let alone after them.
在崑士蘭洲內(nèi)部他自己的表現(xiàn)就有不同，即使在洪水前，更不用說(shuō)在他們之後。

Those who have been bereaved cannot be expected to forget, let alone forgive.
What if you're talking about a group of people that don't have any cows in their vicinity, let alone a sick cow?
萬(wàn)一你遇到一群人,他們附近連頭嬭牛都沒(méi)有,更不用說(shuō)受病毒感染的嬭牛
耶魯公開課 - 生物毉學(xué)工程探索課程節(jié)選
To figure out even what this thing is, let alone how to use it properly. So, you know, I'm sympathetic.
就連認(rèn)出這是什麼東西（都很睏難），更別說(shuō)正確應(yīng)用它了，所以我很同情這點(diǎn)。
經(jīng)常犯的失誤 - SpeakingMax英語(yǔ)口語(yǔ)達(dá)人

The fear they will be unable to support themselves let alone if they have children.
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