在某人不在的时候 in one's absence
在某人不在场的情况下 The manager needs an assistant that he can _A_ to take care of problems in his absence
某人现在不在这儿 somebody is not here
但是如果某人不知道一个循环或者一个数值运算是做什么的，注释的位置并不在这个循环或者运算的旁边，而是在本书的“about loops”或“about operations”章节。
But if someone doesn't understand what a loop or a numeric operation does, the place to explain it isn't next to each loop, but in an "about loops" or "about operations" section of the book.
我在北京只正在寻找某人。如果您不在北京住，不要与我联系。抱歉。
I'm only looking for someone in Beijing. If you do not live in Beijing, please do not contact me. Sorry.
最近一项对醉酒研究的综述发现，在判断某人醉酒的程度上我们很不在行。
A recent review of studies on intoxication has determined that we are very bad at determining just how drunk someone is.
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