subtract

例文

• The pupil could add and subtract but hadn't learned to divide.

  这名小学生能做加法和减法，但还没学会做除法。

• Thus, if you have staff activities in loops and want to run the above request, you need to ensure that you subtract only events which belong together.

  因此，如果您在循环中具有人员活动，并且想要运行以上的请求，那么您必须确保您只减去了属于一起的事件。