each year there is an increasing number of cars on roads

题目

each year there is an increasing number of cars on roads
（ and streets as millions of new cars are produced.）接上面的,括号里的和上面是一句话.翻译上面那句话,

答案

因为每年有成千上万的汽车被制造出来,所以行驶路上的汽车数量也在增长