But if you are so inclined whether for this problem set or any other throughout the term, you can change your mind week to week.
但是如果你倾向哪套题,那么你可以按周改变想法。
Americans spend the most time out of any other people in the world volunteering in average four hours a week, volunteering outside their job which may also have a social objective more than any other people in the world.
比其他任何人所花的时间都多,平均每周有四个小时做志愿者的工作,做与自身工作无关的善事,他们比世界上其他人更具社会目标。
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