In general, a learning curve is nonlinear.

来源: 灰衣人 于 2010-10-13 08:49:34 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)
回答: why is self training so hard? 由 sooner 于 2010-10-13 03:55:17
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