如果除了他自己的牙，安德鲁刷的是其他人的牙，那么通过重读来让你的读者知道他刷谁的牙就很重要了。
If Andrew brushes someone else's teeth beside his own, then it would be very important to let your listeners know that by stressing whose teeth he brushes.
然而，如果其他人在这个过程中受益，而我也得到了一些报酬，那我的动机是什么真的重要吗?
However, if others benefit in the process, and I get some reward too, does it really matter where my motivation lies?
最重要的是，把目标放在对你真正重要的事情上，而不是那些你认为自己应该做或者其他人希望你做的事情上。
Above all, aim for things that are truly important to you, not what you think you ought to do or what others expect of you.
应用推荐