We compared Los--we couldn't go back in a time machine and do questionnaire surveys in the 1880s, but we could do it in the 1980s.

我们不能坐着时光机,回到19世纪80年代去做问卷调查,但是在20世纪80年代却可以

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They invented the paper machine so they could mass-produce paper-- it didn't have to be handmade anymore-- and they invented wood pulp paper so it didn't have to be made out of cloth anymore.

于是人们发明了造纸机从而可以大量生产纸-,而不再需要手工制作-,后来人们还发明了木浆纸,所以后来不再用布料来制纸。

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