愚教授，你這typo也太多了吧！

來源: 於 2011-08-10 23:35:59 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

The body of （an） animal is like a mahcine such as an train engine.

oxygen gas

a digestive tract, which intakes and absort （absorbs） foods， organs which discharges waists

and legs or wings on (with) which the aninmal move（s）.