in polluted urban areas, they also enhance production of ozone, a key ingredient of smog that is potentially toxic to animal and plant life.
在受污染的市区,他们还促进臭氧的产生,臭氧是对动物和植物生命有潜在毒性的烟雾的关键成分。
a research team tests a guinea pig’s reaction to smog in a 1964 l.a. experiment.
1964年,一个研究小组在洛杉矶进行实验,测试豚鼠对于烟雾的反应。
today, due to the smog and pollution, bikes have been regaining their proper position.
如今,考虑到机动车带来的烟雾和污染,自行车正逐渐恢复其应有的地位。
the aggregation of data makes it possible to identify, say, a median level of smog exposure.
这些数据的有机组合使得计算比如烟雾暴露的中位水平成为了可能。
smog is back with a vengeance.
烟雾回来了并带有报复性。
in the case of los angeles dr stark estimates that, by dawn, the amount of pollutants left over to make smog is about 5% higher than it otherwise would have been.
以洛杉矶为例,斯塔克博士估计,到了黎明,城市上空残留下来构成烟雾的污染物数量比没有灯光照射的情况下要高出5%左右。
however, frank kelly, director of environmental research at king「s college london, says the smoke isn」t as dangerous as the industrial smog seen in most cities.
不过,伦敦大学国王学院环境研究主任弗兰克·凯利说,这种烟雾并不像大多数城市看到的工业烟雾那么危险。
london, renowned for centuries for its infamous smog and severe pollution, today has the cleanest air that it has had since the middle ages.
伦敦,因其臭名昭着的烟雾和极其严重的污染而闻名几百年,今天有着自中世纪以来最干凈的空气。
those atoms can contribute to smog formation in coastal areas.
这些氯原子可以促进沿海地区烟雾的形成。
many city kids, even if they did peer through the orange smog above their heads, would probably see only a handful of stars.
很多城市的小孩,即使他们透过他们头顶上的橙色的烟雾,仰望星空,或许也只能看到少量的星星。
the heat has caused widespread drought, ruined crops and encouraged wildfires that have blanketed moscow in smog and now threaten key nuclear sites.
热浪导致大面积干旱,摧毁了农作物,助燃了野火,将莫斯科笼罩在烟雾中,如今又威胁到重要的核设施。