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come out of从…中出来,幸免于,由…引起,产生于
例句：The hunter watched for the hare to come out of the burrow.
猎人守候着兔子从洞里出来。
The success of the demo did not come out of thin air.
这场演示的胜利并不是无中生有的。
2.Should it net more names, more people, give a heads up on who could be a suspicious person?
heads up小心，当心，警告
例句：We usually yell heads up to warn others of an incoming ball.
我们通常吆喝着警告其他人有球传入。
