英语语法分析

Biyophyte spores have three types of aperture, the trilete is original one, the monolete is the evolutionary character and the katalept is mostly common one.

苔藓孢子的外壁纹饰不同，一般认为孢子外壁光滑是进化性状，外壁上各种突起排列密集的则较为原始。