at least we know H2+O=H2O, haha.

yasas · 2012-11-20 17:49:53Z

at least we know H2+O=H2O, haha.簡介

來源: yasas 於 2012-11-20 17:49:53 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

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