The research for the embryo sac structure of early stable rice showed that 90.8% embryo sacs were normal and 9.3% were not.
对早稳型水稻成熟胚囊结构观察结果表明：正常蓼型胚囊占90.8%，异型胚囊占9.3%。
Diverticulum: a pouch or sac branching out from a hollow organ or structure such as the intestine.
憩室，支囊，膨部：从肠之类的中空器官或结构上分支出来的袋或囊。
Compared with several bitumen surface structure types, the paper analyzes its characteristics, and introduces the mixture design and construction control points of SAC-13.
通过沥青上面层几种结构类型的比较，分析了各自的特点，并结合实践叙述了SAC - 13的配合比设计与施工控制要点。
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