As you are required to act as an experimental subject for a certain number of hours in a year - this will be two more of them out of the way.
由于你原本每年就需要作为被试参加一定数量的实验，所以这次只是多了两个小时而已。
As you are required to act as an experimental subject for a certain number of hours in a year - this will be two more of them out of the way.
由于你原本每年就需要作为被试参加一定数量的实验，所以这次只是多了两个小时而已。
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