单词：epigeal cotyledon
epigeal cotyledon的用法和样例：
例句
- The soluble protein declined as the cotyledon development.可溶性蛋白的含量随著子叶的发育而逐步降低。
- Rapid elongation of the hypocotyls after germination pushes the cotyledons above ground in plants showing epigeal germination.种子萌发后下胚轴迅速增长，将子叶顶出地面形成地上芽。
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