let alone

基本解释

The country does not yet have enough electricity for itself, let alone for export.
但是这个国家的电量连自己都不够用，更别说是用来出口了。
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.
就不用说死亡能让我们一生焦虑了，人类基因中自身携带的焦虑就足以让人们焦头烂额了，这种与生俱来的焦虑症候据说并不是人类的专利。
Within the state of Queensland itself there were differences in performance, even before the floods, let alone after them.
在昆士兰洲内部他自己的表现就有不同，即使在洪水前，更不用说在他们之后。

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?
万一你遇到一群人,他们附近连头奶牛都没有,更不用说受病毒感染的奶牛
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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

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