feather germ造句

例句与造句

1. Proliferation of cells in a ring around the feather germ creates a cylindrical depression , the follicle , at its base
   环绕羽芽有一圈细胞不断增生，在基部形成圆柱状凹陷，称为毛囊。
2. Feather growth begins with a thickening of the epidermis called the placode , which elongates into a tube ? the feather germ [ see illustration above ]
   首先，表皮上的基板开始增厚，并拉长成一根管子，称为羽芽（见上方羽毛的成长过程） 。
3. It's difficult to find feather germ in a sentence. 用feather germ造句挺难的