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短语
yolk sac
释义
yolk sac, yolk bag
【胚胎学】
卵黄囊(从脊椎动物胚胎的中肠脐伸出的膨大的胚外囊体,富含卵黄)
卵黄囊(大多数哺乳动物胚胎中不含卵黄的、在胚胎发育早期变为退化器官的同源器官)
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OAO
OAP
OAPEC
oapecs
oaps
O.Ar.
oar
oarage
oared
oarfish
oarfishes
oaring
oarless
oarlike
oarlock
oarlocks
oar one's way
o.a.r.s
oars
oarsman
oarsmanship
oarsmanships
oarsmen
oarswoman
oarswomen
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更新时间:2026/6/14 11:45:15