emission characteristic

例句：

1. 1. The car's emission characteristic is measured by the amount of carbon dioxide it emits.
   汽车的排放特性是通过它排放的二氧化碳量来衡量的。
2. 2. The new engine has a much lower emission characteristic than its predecessor.
   新发动机的排放特性比前一代低得多。
3. 3. The study found that the emission characteristic of the pollutant was significantly reduced afterthe treatment.
   研究发现，在处理后污染物的排放特性显著降低。