This article firstly analyses the existing defects and weaknesses of the present Water Pollution-Discharge Permit System and points out the necessity to perfect it.
本文首先分析了现有水污染物排放许可证制度存在的问题与缺陷，指出完善的必要性。
2
A perfect combustion method is set up after analyzing the procedures of chemical energy change, heat energy transform and discharge of combustion products.
综合考虑燃料与助燃剂、能量传递和燃烧产物排放过程，提出了理想的燃烧组织方式。
3
Our laptop batteries own perfect over-charge, over-discharge, over-temperature etc basic protection functions and double protection performance.