英语语法分析

A key feature is that these conditions may also be present outside of the luteal phase.

一个关键的特征是这些生理状况可能也会在黄体期外出现。

The origination, component, morphology and size of luteal cells are controversial up to now.

人们对黄体细胞的来源、组成、形态及大小持有不同的观点。