圆口纲脊椎动物

1. • cyclostome (marine biology)

Character by character

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