The level of pollution in the river was falling.
该河流受污染的程度其时正在降低。
Another difficult question involves what level of pollution is safe.
另一个难题是什么样的污染水平是安全的？
What is the level of competition in the Indian market for air pollution control equipment?
印度的防止大气污染设备市场上的竞争层级？
It is the information pollution that causes decline of the medical service level.
医疗服务水平下降，其中一个主要原因是医疗服务信息污染。
Its advantages are saving energy, high automation level, no pollution and high quality of product.
本发明节约能源，自动化程度高，无污染，生产的产品质量高。
Its advantages are saving energy, high automation level, no pollution and high quality of product.
本发明节约能源，自动化程度高，无污染，生产的产品质量高。
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