英语翻译 In the past two years,millions of Americans have sudden。

     In the past two years, millions of Americans have suddenly taken an interest in the bicycle as if it were a new invention. Bike sales doubled every year between 1960 and 1970, and there are nearly 70 million bikes in the United States today. That's more than two for every three automobiles.

　　Of course, the bike has been around for more than 150 years, and this isn't America's first bicycle boom (兴旺). A wave of bike enthusiasm swept the land in the late 1800s and bicycle production hit two million units in 1897. Then with the coming of the auto, bicycling declined, and for years remained popular only with children and a few adults.

　　Now, national concern with air pollution and physical fitness has brought the bike back to the forefront (重要位置) particularly with adults. More than eight million bikes were sold in the United States last year and a third of them went to adults. The year before, only 15 percent of new bike sales were for adults.

    是一篇阅读理解中的句子。

    在过去的两年里，数百万美国人突然对自行车产生兴趣，就好像它是一项新发明。在1960到1970年间，自行车销售量每年翻一番，如今美国有近7000万辆自行车。每辆三辆汽车超过两辆。

    当然，自行车已经出现了150多年，这不是美国第一次自行车繁荣。19世纪末，自行车热潮席卷了整个国家，自行车产量在1897年间达到二百万辆。随着汽车的到来，自行车运动逐渐减少，多年来只有儿童和少数成年人才流行。

    现在，国家对空气污染和身体健康的关注已经使自行车重新回到了最前沿，特别是成年人。去年美国售出了八百万辆自行车，其中第三辆是成人车。前一年，只有15%的新自行车销售给成年人。