氮氧化物的浓度的英文

concentration of nitrogen oxides

• 氮:    nitrogen
• 氧化物:    oxide; oxyde; oxid ...
• 的:    4次方是 The fourth po ...
• 浓度:    potency; thickness ...

例句与用法

1. Compared with the figures of 1999 , the concentrations of respirable suspended particulates and nitrogen oxides at the street level in urban areas were eight per cent and 11 per cent lower respectively in 2001
   与一九九九年相比，去年从市区路边空气中所录得的粒子和氮氧化物的浓度，分别降低了百分之八和百分之十一。