Fish are vertebrates because they have ______.

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Fish are vertebrates because they have ______.
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Fish are vertebrates because they have ______.
Fish are vertebrates because they have ______.

Fish are vertebrates because they have ______.
填vertebra
这句话的意思是,鱼是脊椎动物,因为它们有脊椎.
veterbrate可以是形容词或者名词,其中veterb是拉丁词根,表示“脊椎”.

spondyle 脊椎

Gills 鳃