49.对比之下，虽然打印机的销售也出现了升升降降，但总体情况要好于其它三种产品。
In comparison, although there were also ups and downs with the sales of printers, it was all the more better than the sales of other three products.
50.1960年，美国家庭每月在饭店就餐的平均次数要远远高于日本和英国家庭，三者的比例依次为每月次:1.2:0.2:0.4。
In 1960, American families ate out at restaurants much more often than Japanese and British families and the average frequency ratio was 1.2:0.2:0.4 times per month.
