单词 | smogs |
例句 | DEFINITIVE EXAMPLES 权威例句Photochemical smogs are worse in summer, when the sun's rays on the cloud of traffic fumes produce a photochemical reaction, creating high levels of ozone.当夏天阳光照射在交通排放的废气团上,产生光化作用释放大量臭氧,光化烟雾就更加严重了。剑桥国际 |
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