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vehicle emission
gen. 废气排放
auto. 车辆排放入大气中的污染物
oil 车辆排放物
tech. 车辆废气排岀; 机车排气; 车辆排出物; 汽车排放物
vehicle emission: 48 phrases in 5 subjects
Automobiles33
Aviation1
Ecology2
Environment5
Technology7