Using the real point source coaxial technology.

采用真正的点声源同轴技术。

But the main contributor of BOD was point source pollution.

而BOD的主要贡献者则是点源污染。

And agricultural non-point source pollution is the top priority.

而农业面源污染又是重中之重。

The mixing law of the continuous point source, in the nature flow, is studied.

研究了连续点源污染物在近区的垂向扩散规律。

Soil erosion and non point source pollution are two serious environmental issues.

土壤侵蚀与非点源污染是两大重要的环境问题。