单词：primary endosperm cell
primary endosperm cell的用法和样例：
例句
- First two divisions of endosperm are nuclear, and the next divisions are cellular.初生胚乳核第一及第二次分裂为核型，第三次之后为细胞型。
- The other male gamete fuses with the secondary nucleus, forming the primary endosperm nucleus.另一个雄配子和次生核结合形成初生胚乳核。
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