____(孤独), isolation, or new environments in themselves are not enough; you must also complete tasks that are relaxing and educational.
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I processed my experiences ____(系统地) .
I needed some kind of transition from my old life to a new one, a sort of ritual that would help me to ____(使转化) myself from one person into another.
I made changes when I returned that continued the ____(变化) that started while I was in Aruba.
I decided that much of my future traveling would have some ____(起改变作用的) dimension to it.