牛津词典：
a creature that is covered with feathers and has two wings and two legs. Most birds can fly.
鸟的特征：
一种生物（a creature）覆盖着羽毛（that is covered with feathers）有两只翅膀（and has two wings）两条腿（and two legs）鸟的属性：
大多数鸟可以飞（Most birds can fly）单词选自：
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根据艾宾浩斯记忆原理，请复习单词：