They are for teaching purpose.

来源: yoba 于 2010-03-16 12:10:46 [] [旧帖] [给我悄悄话] 阅读数 : (97 bytes)
本帖于 2010-09-28 08:04:20 时间, 由超管 论坛管理 编辑
回答: for about 1 month, 由 yoba 于 2010-03-16 12:02:09

I guess you are asking where they came from, it's beyond me. There are other organs as well.

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