“yolk sac”的概念、定义、翻译、参考文献-科学参考

单词	yolk sac
释义	yolk sac [`yōk ´sak] ^EMBRYOLOGY A distended extraembryonic extension, heavy-laden with yolk, through the umbilicus of the midgut of the vertebrate embryo.
随便看	yawing yawing axis yaws yaw simulator y axis Yb Y block Y branch Y chromosome Y circulator Y connection y coordinate Y cut yd Y-delta transformation year yeast yellow yellow arsenic yellow cake yellow cedar yellow coal yellow copperas yellow cypress yellow dwarf

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