v开头单词
Skin incisions were done between two sulcus auriculae posterior. Forehead skin was bluntly separated from the skull periosteum by blood vessel forceps.自两耳根后缘连线间横行切开皮肤;在头部皮肤与颅骨骨膜之间用血管钳钝性分离,植入50ml扩张器。