yolk sac

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)

• line density
• necessary bandwidth
• shantying
• radar volume
• keep within bounds
• keep one's distance
• shower caps
• embryopathies
• electrophoresing
• rumbled
• demean by
• firebrands
• infortunes
• berlinite
• categorical imperatives
• play dumb
• stick by sth
• rainily
• hunt grass
• have a nodding acquaintance (with sb)
• anthemiss
• Epidaurus
• kiddiewinkie
• beat up on someone
• bridge oscillator
• I ought to know
• antinomianism
• package board
• ringmaster
• cannot see the wood s for the trees
• go down in the world
• solemnisers
• mongrelises
• imperishables
• shilohs
• ethnobotanical
• bezoar
• Shope virus
• without missing a beat
• sea wall
• butylated
• do business with
• celebratings
• misbeseeming
• mnemonical
• thromboxane B
• charlie noble
• stereophonic record
• algidity
• stand on
• edged tools
• the goose that lays the golden eggs
• bureaucratic procedures
• Rockne, Knute Kenneth
• gallicolous
• vertical interval reference
• laders
• VZIG
• biddi-biddi
• Blancan
• jump shots
• boston tea parties
• in the bud
• tinkliest
• cut it/things fine
• Synchytriaceae
• ringmen
• brunets
• monomachies
• disquantitied
• shellbark
• flow valve
• Easter week
• one-egg
• trestlework
• whip graft
• House of Burgesses
• inexorability
• engorgements
• peerages
• dandelions
• the south
• with style
• knock Priscian's head
• evergladess
• LIRES
• aboon
• tournois
• radar cross section
• kindledling
• seatmates
• cavern
• voltage-controlled oscillator
• join the angels
• hellacious
• philed
• sporophores
• wave motor
• aughter
• Comanches