n.操练( drill的名词复数 )；钻头；军事训练；（应对紧急情况的）演习v.钻（孔）( drill的第三人称单数 )；打（眼）；操练；训练 英英释义： drill[ drilz ]n.a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)similar to the mandrill but smaller