纖維素的消化 - 社會議題
By Hamiltion
at 2013-11-27T00:00
at 2013-11-27T00:00
Table of Contents
牛羊吃纖維素可以獲得生存所需的養分.為何人類無法直接消化纖維素來獲得養分?
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社會議題
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By Enid
at 2013-11-30T10:19
at 2013-11-30T10:19
By Thomas
at 2013-11-30T05:55
at 2013-11-30T05:55
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