通常指两个位于胚囊中间的单倍体核，他们可能融合形成一个二核的中央细胞。

Polar nuclei The, usually two, haploid nuclei found midway along the EMBRYOSAC, forming a binucleate central cell. They may fuse to form the diploid definitive nucleus.

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在2008年八月，v1309发生了最后的裂变，两个星核也终于合二为一，其发光的亮度也随之急剧提升。

V1309's final burst then occurred in August 2008 when the stars' cores finally became one and its brightness increased rapidly.

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虽然扩大核能发电规模可能减少二氧化碳排放，但也意味着会在多得多的国家，产生多得多的富集核材料。

Though this might mitigate carbon dioxide emissions, it will mean a lot more enriched nuclear material generated and in many more countries.

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