圆口纲脊椎动物

yuán kǒu gāng jǐ zhuī dòng wù

cyclostome (marine biology)

yuán

circle

kǒu

mouth

gāng

head rope of a fishing net

(bound form) spine; backbone

zhuī

(bound form) vertebra

dòng

(of sth) to move

(bound form) thing