Smoke emissions

• 烟度排放

Smoke emissions的用法和样例：

例句

1. Comparative study was conducted on a naturally injected aspirated high speed D.I. diesel engine to investigate the effects of diesel and methanol injection on the smoke.
   在一台高速非增压直喷柴油机上对进气喷甲醇和纯柴油的瞬态烟度排放两种情况进行了试验对比研究。