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pollen tube
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pollen tube
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理学
花
释
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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astronomical research
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astronomical spectral analysis
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Astronomical telescope
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astronomical tests of general relativity
astronomical theodolite
astronomical tide
astronomical time
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