then and only then

常见例句

It was then and only then that the Great Depression truly ended.
只有到那个时候大萧条时代才真正结束。
"Then and only then, talk about your area of expertise as the solution to that problem," says Morgan.
“然后，也只有在这之后，谈你的专家领域里如何解决那个问题的，”摩根说。
The truth is that once American consumers start demanding cosmetics that are cruelty-free, then and only then will American manufacturers stop torturing animals in the name of beauty.
事实就是，一旦美国消费者开始要求人道化妆品，那时候，而且只有那时，美国制造商才会以美丽的名义停止对动物的折磨。

Back then,there was much hope that humans would return soon and make a home on Earth's only natural satellite.
So the question was, why is this return down at this level, it says, well if I ever execute out of this FOR loop, I get to the end of the FOR loop without hitting that branch that took me through the return, then and only then do I want to actually say, gee, I got to this place, there isn't any value to return, none I'm going to return none and none.
问题是，为什么它是在这个级别上返回值呢，意思就是如果我出了这个for循环,就意味着我运行的过程中没有走到任何,带return的支路上去,这时也只有这时我才能说天呐,我终于走到这儿了，这时不会返回任何值，只会返回none和。
麻省理工公开课 - 计算机科学及编程导论课程节选
Read everything you can, Milton insists, because only then can you overcome what he thinks of and characterizes as the temptation of reading.
尽可能地阅读，弥尔顿坚持到，因为只有这样你才能抵抗他认为以及标榜为的,阅读对人产生的诱惑。
耶鲁公开课 - 弥尔顿课程节选

Then and only then can you be confident that your message is getting through.
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Then senior and uninsured depositors jointly and then finally, and only then, taxpayers and or insured depositors.
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Then and only then will they really pose a continuing threat to the competitive position of U.S. corporations.
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