当他是一名飞行员时，他曾在一次任务期间半年不回家。
When he was a pilot, he once did not come back home for half a year during a mission.
在网络泡沫达到至高点时，我们曾在网上以一次5美元为单位要求获得捐款。
At the height of the d. o. t-c. o. m bubble, we solicited online donations at $5 a piece.
但是，这一次有许多原因，我曾在那里。
But this time there were many reasons for which I had to be there.
爱丽丝在她的头叫我的名字，并曾在一次我的注意。
Alice called my name in her head, and had my attention at once.
我曾在很多场合，和每一次我得到非常接近这个数字。
I have on many occasions, and every time I got very close to that figure.
有些人曾在飞机上喝醉过，这样做的好处是你犯了一次以后就不会再犯了。
Unfortunately, some people have been there and done that. The nice thing is that once you do it one time, you never do it again.
有些人曾在飞机上喝醉过，这样做的好处是你犯了一次以后就不会再犯了。
Unfortunately, some people have been there and done that. The nice thing is that once you do it one time, you never do it again.
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