英语语法分析

The stings of coelenterates are quite sensitive towards outside stimulation.

腔肠动物的刺针对于外界的刺激很敏感。

Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes.

以世代交替为特色的腔肠动物；通常群居的水螅阶段先于水母阶段；水螅和水母。