secondary protonema

• 次生原丝体

secondary protonema的用法和样例：

例句

1. Describing the characters and developmental features of spore germination and protonema development of moss applied in this research by microscopy.
   采用显微观察的方法具体描述了藓类植物孢子萌发与原丝体发育的特征及发育特点。