名词
中文翻译：胚乳
同义词：
['seed coat', 'endosperm']
例句：
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1.The seed is encased in a tough outer layer called the seed coat.
种子被坚硬的外层包裹，称为种皮。
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2. The endosperm is where the nutrients are stored for the growing plant.
胚乳是储存养分供植物生长的地方。
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3. The seeds of this plant have a hard seed coat and a softer endosperm.
这种植物的种子有硬的种皮和软的胚乳。