也就不用考虑那桶盖子开开关关多少次了。
Not to mention how many times that bin has been opened and closed.
成批处理你的邮件会更高效，而不是每次开开关关收件箱只为单独地处理一两封邮件。
It's much more efficient to batch-process your emails than to keep popping in and out of your inbox to deal with individual ones.
如果他走近些，他大概会从灯火闪来闪去，以及外面那些门的开开关关，发觉里面出事了。
If he had come nearer, he would probably be aware, from the lights flitting to and fro, and the opening and shutting of the outer doors, that all was not right within.
平时，刚开始上课的时候，在街上就能听到课桌开开关关的乒乓声和孩子们一遍遍高声念课文的读书声。
Usually at the beginning of school, the noise of desks being opened and closed, and lessons repeated at the top of the children "s voices could be heard out in the street."
平时，刚开始上课的时候，在街上就能听到课桌开开关关的乒乓声和孩子们一遍遍高声念课文的读书声。
Usually at the beginning of school, the noise of desks being opened and closed, and lessons repeated at the top of the children "s voices could be heard out in the street."
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