... work out 算出（总数） to work out a sum 算出总数 带来好结果；有预期的结果 ；运动；锻炼；（矿山）开采完，采尽 work at 在做...
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第一步：将所有收入都加起来，计算出总数。
要算出总数来可能会花费好几个小时，所以我得求助于袖珍计算器了。
It will take hours to work the sum out, so I have to turn to my pocket calculator.
有个好玩的办法可以保持孩子对跑步的热情，就是记下他们跑过的距离并算出总数。
A fun way to keep kids excited to keep running is to have them track their distances and add them up.
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