n.四倍；空铅；（大学的）四周有建筑物围绕的方院；四胞胎之一vt.在…填补空铅； 变形： 复数：quads 英英释义： quad[ kwɔd ]n.one of four children born at the same time from the same pregnancy同义词：quadrupleta muscle of the thigh that extends the leg同义词：quadricepsquadriceps femorismusculus quadriceps femoris