我怎么学到泛型刚开始觉得有点吃力？老了？笨了？还是。。。。。
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http://www.cnblogs.com/time-is-life/articles/781761
http://www.cnblogs.com/time-is-life/articles/783472
http://www.cnblogs.com/time-is-life/articles/781757