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archegonium
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archegonium
Encyclopedia
理学
〔植物形态与结构〕
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archegonium
颈卵器
苔藓植物、蕨类植物和大多数裸子植物的雌性生殖器官。产生卵细胞、受精及原胚发育的场所。
Biology
archegonium
颈卵器
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concave grating
concave kite
concave lens
concave metric
concave minimization problem
concave mirror
concave operator
concave polygon
concave polyhedral angle
concave polyhedron
concave probability measure
concave programming
concaver
concave sequence
concave space
concave surface
concave-up
concave-up curve
concave upward
concavity
concavity coefficient
concavity cut
concavity cutting-plane method
concavity downward
concavo-concave
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