圓口綱脊椎動物

1. • cyclostome (marine biology)

Character by character

• 圓(yuán)circle
• 口(kǒu)mouth
• 綱(gāng)head rope of a fishing net
• 脊(jǐ)spine
• 椎(zhuī)vertebra
• 動(dòng)move
• 物(wù)thing