button. 那个小女孩系不上领扣.The little girl can't fasten the collar.我系不上这个领扣.I can't fasten this collar button.那个小女孩系不上领扣.The little girl can't fasten the collar button....
湿疹是一种常见的皮肤病,通常具遗传性。Eczema is a common skin complaint which often runs in families.口吃很可能是一种遗传性缺陷。Stammering is probably an inherited defect.遗传性疾病治疗起来很困难.It's very difficult to treat genetic diseases....