1．1．2原卵区 生殖干细胞位于原卵区较远的前端，与称为端丝（terminal filament）的体细胞 3 第一章文献综述 家蚕卵巢生殖发育相关基因的研究 结构接触。
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是怎样的缘份，使我们相识、相知、相爱？哦，我知道了，在生命的际遇里，牵着两端的，原来是一丝真情。
What fate brought us together, made us know each other, understand each other and love each other? Oh, I see, it was a pure love that links us two in life.
钢管和管件有两种标准端部型式，即：法兰和丝扣。
Two types of end are standard on steel pipes and fittings, that is flanged and screwed.
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