两栋小楼的底层已经彻底翻修过。The downstairs of the two little houses had been entirely refashioned.从底层干起，然后努力一步步升上去。Start at the bottom and try to work your way up.“身居高位很辛苦，”他说。“在底层更辛苦，”这个亿万富翁机敏地回答道。"It's tough at the top," he sa...
油污会腐蚀轮胎的橡胶.Oil and grease will rot the rubber of the tyre.有一股浓烈的烧轮胎的气味.There was an overpowering smell of burning tyres.制造轮胎的原材料是提炼汽油时产生的一种副产品。The raw material for the tyre is a by-product of petrol refining....