Mammals are cover by hair and fur and have backbone and warm blood ,all female mammal produce milk for the young ,reptile are cover by scales and including snake lazar and tortoise ,
Mammals are cover by hair and fur and have backbone and warm blood ,all female mammal produce milk for the young ,reptile are cover by scales and including snake lazar and tortoise ,
本文标题：L3-U1-P1-Vocabulary
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