noun 下载 🔗分享 胎叶 Each of the patches of vili on the foetal chorion in the placenta of ruminants and some other mammals. Examples : "The veterinarian pointed to the image of the cow's placenta and explained that each cotyledon helps provide nutrients from the mother to the developing calf. " 兽医指着母牛胎盘的图像解释说，每一个胎叶都有助于将母体的营养输送给正在发育的小牛。 organism animal anatomy physiology biology 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 子叶 The leaf of the embryo of a seed-bearing plant; after germination it becomes the first leaves of the seedling. Examples : "The young bean sprout pushed through the soil, revealing its two cotyledons, small leaves that provided initial nourishment before true leaves developed. " 刚发芽的豆芽拱出了土壤，露出了两片子叶，那是真叶长出之前提供最初养分的小叶片。 plant biology seed nature agriculture 与AI对话词汇游戏阅读练习
