por是什么意思

用法例句

The result of calculation indicates that 55% improvement of power can be achieved on full load by the Ultrahigh supercharged diesel engine PA6, which worked on Millercycle by means of integrated electronic control technology on fuel injection and gas exchange,and 3 MPa～4 MPa improvement of peak pressure can be.

建立了PA6-280柴油机零维模型,通过仿真计算分析了在PA6-280柴油机上采用超高增压技术的技术改进方向。