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1. This automatic volume controller allows you to adjust the volume of your music without having to manually turnup or down the volume.
这个自动音量控制器可以让你在不手动调整音量的情况下，调整音乐的音量。
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2. The automatic volume controller on my car's radio is very useful for keeping the volume at a comfortable level while driving.
我汽车收音机上的自动音量控制器对于保持音量在一个舒适的水平上驾驶非常有用。
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3. In this new software update, we have added an automatic volume controller that can automatically adjust the volume based onthe noise level in the room.
在这个新的软件更新中，我们添加了一个自动音量控制器，可以根据房间内的噪音水平自动调整音量。