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: A procedure had been studied on cryopresrvation of Loquat (Eriobotrya japonica Lindl.) pollen by the method of dry freezing.
中文: 摘要采用花粉干冻法对枇杷花粉超低温保存进行了研究。
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英文: Abstract: According to researches on Jurassic Sporopollen features and physical characters of rocks in northwest area, it has been considered that the most obvious temperature-rise event, happened in the late stage of Middle Jurassic to the end of Late Ju
中文: 文摘:通过对西北地区侏罗纪孢粉学特征的研究，并结合岩石的物理属性，认为中侏罗世晚期到晚侏罗世末存在一次最为明显的升温事件，其主要原因是由于侏罗纪全球性气温升高所导致。
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英文: Abstract: The main characters and seed set of BC1，BC2，BC1F2 from MS line back-crossing with the pollen of hybrid rice were studied.The appearance of a large number of self fertile plants in MS line was analyzed.The effect of introgression of restoring gen
中文: 文摘:研究了杂交稻花粉对母本不育系回交后代群体BC1、BC2、BC1F2的主要农艺性状和育性表现，分析了不育系中出现大量自交结实株的原因，讨论了恢复基因渗入对籼、粳不育系纯度和杂交稻产量的影响，指出“同质恢”对降低不育系纯度的严重性和杂交稻作制种田隔离区的不合理性。
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英文: Abstract: The pollen morphology of 5 species of Corydalis from northeast China was observed and compared by SEM.The results declared the shape and size of the pollen and exine sculpture of the 5 species were basically stable and could serve as a taxonomic
中文: 文摘:用扫描电镜对东北延胡索极其近缘植物的花粉形态进行了观察，结果发现花粉粒在形状、大小、外壁纹饰、沟的长短及宽度等方面均有区别，从中获得了东北延胡索及其近缘植物分类方面的孢粉学依据.因此花粉的特征可用于区别延胡索类植物.
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