A few years ago, we started this kind of "favor war" where one of us would do something kind for the other, such as cleaning up the driveway or building a shed, and next time the other would try to top it with another favor.
几年前，我们开始了这种“人情战”，我们中的一个人会为另一个人做一些好事，比如清理车道或搭建棚子，下次另一个人就会试图用另一个人情来顶上。
If you find the pressure building up, find some time for yourself to do something that you really enjoy.
一旦你感受到了压力，你应该给自己一点时间做自己真正喜欢的事情。
And some go for pure chemistry, breaking the cellulose down into a gaseous mixture of hydrogen and carbon monoxide before building it back up into something more useful.
也有的是纯粹的化学，将纤维素分解成一种氢和碳的气体混合物，然后再将其合成更为有用的东西。
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