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双受精
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双受精
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双受精
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double fertilization
双受精
被子植物的同一个雄配子体中形成的两个精子,一个与单倍体的卵细胞融合形成二倍体的合子,另一个与二倍体的中央细胞融合形成三倍体的初生胚乳细胞的现象。
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double fertilization
双受精
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astronomical spectrophotometer
astronomical spectrophotometry
astronomical spectroscope
astronomical spectroscopy
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Astronomical telescope
astronomical telescope
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astronomical tests of general relativity
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astronomical unit, AU
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Astronomic Map in Beijing Longfu temple caisson
Astronomic Map in Suzhou
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