原文：By the end of the 1980s, output per person in manufacturing was half as much again as it had been at the start of the decade. 译文：到二十世纪八十年代末，制造业的人均产量是八十年代初的一半。
改译: 到二十世纪八十年代末，制造业的人均产量比八十年代初增长了50%。
原文：By the end of the 1980s, output per person in manufacturing was half as much again as it had been at the start of the decade. 译文：到二十世纪八十年代末，制造业的人均产量是八十年代初的一半。
改译: 到二十世纪八十年代末，制造业的人均产量比八十年代初增长了50%。
