Jet noise is very common, and it is the most important source of environmental pollution.

喷注噪声是一种最常见的噪声，它是环境噪声污染的重要祸源。

youdao

Jet noise is very common, and it is the most important source of environmental pollution.

喷注噪声是一种最常见的噪声，它是环境噪声污染的重要祸源。

youdao