回复：人做任何事都是需要动力的。比如说有人自愿打扫房间，因为他需要一个干净的生活环境，

来源: bluelopez 于 2013-09-17 11:52:19 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (164 bytes)

even in college, when reading became assignments, we lost interest, but for the books we picked ourselves, could not put the book down, read till midnight :)

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