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placoderm的英文翻譯是什么意思，詞典釋義與在線翻譯：
英英釋義
Noun:
- fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws
超過信息獨家代理制作，受著作權自我保護，版權侵權必究
- 現在網絡熱詞
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