1.In a testing of petrolic engine, about 70% to 80% of nonmethane hydrocarbon is emitted into atmosphere without catalysis conversion in theoment of coldstart, so that serious pollution is produced.

1.在汽油机一个测试循环中,约占排放污染70%～80%非甲碳氢是在汽油机冷起动阶段没有经催转而直接排入大气中,造成严重污染。