单词	polar nucleus
释义	polar nucleus noun : either of the two nuclei of a seed plant embryo sac that are destined to form endosperm Word History First Known Use 1882, in the meaning defined above
随便看	insist (on) insist on insist on/upon insist upon insisted insisted (on) insisted on insistence insistences insistencies insistency insistent insistently insister insisters insisting insisting (on) insisting on insistingly insistive insists insists (on) insists on insition insititious

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