pollen grain

常见例句

Pollen grain is mainly 2-celled type when shed, occasionally 3-celled type, and has three apertures.
成熟花粉多为2-细胞型，偶见3-细胞型，具三萌发孔。
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The characteristics of pollen grain are related with the distribution of Gnetum and classified system of subgenus.
买麻藤属植物孢粉学特征与地理分布及属下分类系统有一定的关系。
The ubisch bodies which appeared on the inner tangential wall of the tapetum at the time of microspore wall formation are partially remain on the surface of matured pollen grain.
小孢子壁形成时开始在绒毡层内切线壁出现的球状体到花粉粒成熟时仍有一部分附着于花粉粒表面。