Noise barrier is a kind of effective and economical method to reduce traffic noise.

声屏障是降低交通噪声等流动性声源的一种有效而经济的方法。

youdao

Noise barrier is a kind of effective and economical method to reduce traffic noise.

声屏障是降低交通噪声等流动性声源的一种有效而经济的方法。

youdao