If you really had to group people by their travel habits, I'd say there are probably two different categories out there: explorers, and relaxers.
但如果你真的必须想按旅游习惯分类，或许我会建议这两种类别：探索者和休闲者。
The following two books don't really fit the above categories, but I have found both of them useful and refer to them regularly.
虽然下面的两本书不属于上面所列书籍的种类，但是我认为这两本书都很有用处。
The following two books don't really fit the above categories, but I have found both of them useful and refer to them regularly.
虽然下面的两本书不属于上面所列书籍的种类，但是我认为这两本书都很有用处。
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