1、Most flowering plants are cotyledonous, meaning they have seedlings with true leaves after germination.
大多数开花植物都是有子叶的，也就是说它们在萌发后会有真正的叶子。
2、The cotyledonous seedlings in the greenhouse are growing rapidly under the controlled environment.
温室里的有子叶幼苗在受控环境下快速生长。