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The sperm fuses with the egg to begin the process of fertilization.
精子与卵子结合开始受精过程。
《牛津词典》
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Describe the process and significance of double fertilization.
被子植物的双受精过程及其意义？
youdao
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Describe the process and significance of double fertilization.
被子植物的双受精过程及其意义？
youdao