A travel book is about someone who goes somewhere, travels on the ground, sees something and spends quite a lot of time doing it, and has a hard time, and then comes back and writes about it. It's not about inventing.
一本旅行书是关于一个人，他去了某个地方，在地面上旅行，看到了一些东西，花了很多时间去做它，经历了一段艰难的时光，然后回来写了一些关于它的东西。这与发明无关。
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