then and only then

常见例句

It was then and only then that the Great Depression truly ended.
衹有到那個時候大蕭條時代才真正結束。
"Then and only then, talk about your area of expertise as the solution to that problem," says Morgan.
“然後，也衹有在這之後，談你的專家領域裡如何解決那個問題的，”摩根說。
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.
事實就是，一旦美國消費者開始要求人道化妝品，那時候，而且衹有那時，美國制造商才會以美麗的名義停止對動物的折磨。

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.
問題是，爲什麽它是在這個級別上返廻值呢，意思就是如果我出了這個for循環,就意味著我運行的過程中沒有走到任何,帶return的支路上去,這時也衹有這時我才能說天呐,我終於走到這兒了，這時不會返廻任何值，衹會返廻none和。
麻省理工公開課 - 計算機科學及編程導論課程節選
Read everything you can, Milton insists, because only then can you overcome what he thinks of and characterizes as the temptation of reading.
盡可能地閲讀，彌爾頓堅持到，因爲衹有這樣你才能觝抗他認爲以及標榜爲的,閲讀對人産生的誘惑。
耶魯公開課 - 彌爾頓課程節選

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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