The output of steel this year has increased by 20% compared with that in 1992.今年钢产量比一九九二年增长了百分之二十。Passenger traffic has gone up by 20 per cent.客流量已增长百分之二十。The output of the factory this year has increased by 20 percent as compared with last year.这家厂今年的产量比去年增加了百分之二十。