英语语法分析

Amphioxus, a cephalochordate, is an important model for studies of evolution and comparative biology.

文昌鱼是研究进化和比较生物学的重要模式生物。

In evolution, Amphioxus, a cephalochordate, has been regarded as the living fossil closest to the vertebrates.

在进化中，头索动物文昌鱼被认为是接近于脊椎动物的活化石。