彻底刷牙有助于口气清新。A thorough brushing helps to freshen up your mouth.空气稀薄清新，其间日光蒙眬，寒气逼人。The air was thin and crisp, filled with hazy sunshine and frost.她的房子光线充足，空气流通，清新整洁。Her house is light and airy, crisp and clean....
你可以说我们一直不走运吧。You might say that we've been victims of circumstance.你不在伦敦真是走运了。Thank your lucky stars you're out of London.我们不会永远走运。Our luck couldn't hold for ever....
Sugar and its byproduct are the basis of the island's economy.糖及其副产品是这个岛国经济的基础.Becoming a baseball fan was a byproduct of my research into sport on TV.我成了棒球迷,是研究电视体育节目的副作用.Refinery and petrochemical operation produc...