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单词
sperm nucleus
释义
sperm nucleus
[`spǝrm ´nü·klē·ǝs]
BOTANY
One of the two nuclei in a pollen grain that function in double fertilization in seed plants.
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obsidianite
obsolescence
obsolete
obstacle
obstacle clearance
obstacle clearance box
obstetric
obstetrical analgesia
obstetric forceps
obstetrician
obstetrics
obstipation
obstructed stream
obstruction
obstruction beacon
obstruction buoy
obstruction light
obstruction marker
obstruction moraine
obstruction to vision
obstructive atelectasis
obstructive dysmenorrhea
obstructive emphysema
obstructive glaucoma
obstructive hydrocephaly
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