这是一座用石头建成的桥梁,桥洞都呈拱形, 非常结实, 既雅致又坚固.It was of stone arches, splendidly solid, and graceful as they were strong.脑袋从两耳间到后脑的地方略呈拱形.Skull - The skull is arched gently over the occiput from ear to ear.这房子的屋顶呈拱形.The house is roo...