EARLY DEVELOPMENTAL EGGS WITH PERIVITELLINE SPACE FROM PRECAMBRIAN WENG’AN FAUNA, WENG’AN, CENTRAL GUIZHOU (SOUTH CHIN前寒武纪瓮安生物群具围卵腔结构的胚胎及其发育序列
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Establishment of a technique to generate transgenic sheep by perivitelline injection of lentivirus vector卵周隙内注射慢病毒生产转基因绵羊的方法