我订阅《铁路杂志》已有很多年了。I have been a subscriber to Railway Magazine for many years.冬天的突然降临让铁路和航空运输系统陷入混乱。The sudden onset of winter caused havoc with rail and air transport.英国铁路公司遭受了4,500万英镑的巨额损失后境况更加惨淡。The gloom deepened after...
Ozone is a highly reactive form of oxygen gas.臭氧是一种非常活跃的氧气形态。Ozone is produced by the reaction between oxygen and ultra-violet light.臭氧由氧气和紫外线发生反应而产生。Every spring the ozone is chewed up, and the hole appears.每年春天，臭氧遭到破坏，...