To answer this question, let's first go back to the 1940's after World War Two.
要回答这些问题, 我们先得回到二战后的四十年代.
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Back in my salad days my friends and I used to go dancing every Saturday night.
回想我那时,年少不更事,每个周六的晚上都和朋友们去跳舞.
《简明英汉词典》
If something goes terribly wrong, they can always go back to the running system from yesterday.
如果系统某一部分发生严重故障,它们可以总是从昨天返回正在运行的系统。
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东海黄公安期生从艺从芝罘山学道回来后,学道回来后,手持宝刀就可以使老虎乖乖听话,宝刀向前一挥,老虎不敢后退;
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