英语语法分析

The brain was composed of protocerebrum, deutocerebrum and tritocerebrum.

大脑由前脑、中脑和后脑组成。

The brain was composed of protocerebrum, deutocerebrum and tritocerebrum;

脑较发达，包括前脑、中脑和后脑；

Brain mostly concrescenced at P phase, while tritocerebrum was still separate.

仔虾期脑的大部分已经愈合，但后脑仍分离。