词汇	convex concave
释义	convex concave adj.凸凹的
随便看	specialties of Malayan Chinese arts Specialties of Network Security specialties related to Chinese languages specialties setting specialties setup specialties study Specialties,Surgical specialties teacher specialties yuan dynasty special time special tipper special tire special to Special tobacco Special to defend the power special token special tolerance Special Toll special toll trunk circuit special tonnage duty special tonnage tax special tool special tool and device special tool and equipment special tool for service