单词 | 极核 |
例句 | DEFINITIVE EXAMPLES 权威例句〔polar nucleus〕Either of two nuclei located centrally in a flowering plant embryo sac that eventually fuse to form the endosperm nucleus.极核:位于一株开花植物的胚囊中央的两个细胞核的任一个,这两个细胞核最终融合而形成内胚乳细胞核美国传统 |
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