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pollen tube
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pollen tube
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理学
花
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pollen tube
花粉管
花粉萌发时,由花粉内壁向外伸出形成的管状结构。通常是营养细胞(或称管细胞)进一步生长发育的结果。
Biology
pollen tube
花粉管
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Riverside Church in New York City
riverside historic town
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Riverside Park
rivers in China
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river snails
rivers of scenic regions
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Rivers without Navigation Marks
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river systems in China
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river topography
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river valley landform
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Rivest-Shamir-Adleman cryptosystem
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