1. You can vary the loudness of the radio by turning this knob to right or left. 你可以通过向左或向右旋转这个钮来调节收音机的音量。
2. He shouted with extreme loudness. He made a bass drum of Miss Martha's counter. 他拼命叫嚷着，用力地敲着玛莎小姐的柜台，像是在敲低音大鼓。
3. The timing, loudness and direction from which the echo arrives at each ear indicate the direction and distance of the object. 回声抵达双耳的时机、回声的大小和回声的方向表明了物体所处的方位和距离。
英英解释
n.
1. the magnitude of sound (usually in a specified direction)
2. tasteless showiness
