名词
中文翻译：核
同义词：
['core', 'nucleus', 'center例句：1. The nucellus of the dinosaur eggs is visible in this fossil.（恐龙蛋的核在这块化石中可见。）2. The nucellus of the flower is the part that produces pollen.（花的核心是产生花粉的部分。）']
例句：
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1. The nucellus of the dinosaur eggs is visible in this fossil.
恐龙蛋的核在这块化石中可见。
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2. The nucellus of the flower is the part that produces pollen.
花的核心是产生花粉的部分。
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3.The nucellus of the embryo is the first stage of development.
胚胎的核心是发育的第一阶段。