以下为句子列表：
英文: A microscopic fossil, as of a pollen grain or unicellular organism.
中文: 微体化石一种微小的化石，如花粉粒或单细胞有机体的化石
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英文: In many gymnosperms the nuclei divide within the pollen grain to produce a small number of cells (2-40 depending on the group )representing the male prothallus.
中文: 在许多裸子植物中，细胞核在花粉粒中分裂以产生少量的细胞（2～40个，取决于不同种类），代表雄性原叶体。
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英文: It had snow-melting-like veins on the surface of pollen grain with several hollows.
中文: 萌发孔沟多为3对（顶分体3条，侧分体各对应1条），以四面体几何中轴为中心，中心对称分布于四面体的3个侧面。
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英文: Oleifera was observed with LM.Results showed that there were vegetative cell and generative cell in the pollen grain of Genus Camellia, the generative cell is more smaller than that of the vegetative cell.The generative cell was lay on the vegetative cell
中文: 结果表明，山茶属植物花粉粒中含有生殖细胞和营养细胞，生殖细胞较小，呈长纺锤形，游离在营养细胞中，生殖细胞极轴两端的细胞膜和核膜与营养细胞的细胞膜相连，其中一端的连结处位于花粉粒萌发孔附近。
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英文: Results showed that pollen germination rate, pollen stain-ability, pollen grain amount and so out had remarkable difference between the two cultivars and Lipeng No.2 pollen belonged to low-fertility type.
中文: 结果表明，丽椪2号花粉发芽率、花粉染色活力和花粉粒数量等与有核对照存在显著性差异，属于低育型花粉。
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