英语语法分析

Gnathostomes include the bony Osteichthyes and the cartilaginous Chondrichthyes.

有颌类包括硬骨鱼类以及软骨鱼类。

Chondrichthyes (sharks, rays and chimaeras) account for only 2% of gnathostome species, the Osteichthyes accounting for the other 98%.

软骨鱼类(鲨鱼、鳐、银鲛)仅占有颌类物种数的2%，其余98%的有颌类都属于硬骨鱼类。

Acipenser is an old fish group in Osteichthyes because it finds favour in people 's eyes with high not only nutrition but economic value.

鲟鱼是硬骨鱼系中一类古老的类群，由于具有极高的营养价值而倍受人们的青睐，经济价值较高。