牛津詞典：
a creature that is covered with feathers and has two wings and two legs. Most birds can fly.
鳥的特徵：
一種生物（a creature）覆蓋著羽毛（that is covered with feathers）有兩隻翅膀（and has two wings）兩條腿（and two legs）鳥的屬性：
大多數鳥可以飛（Most birds can fly）單詞選自：
人教精通版小學《英語》三年級上冊
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根據艾賓浩斯記憶原理，請複習單詞：