Correct or improve the translation of the following English sentences.原文：The production of various electron tubes has been increased four times as
against 1958.
译文：各种电子管的产量比1958年增加了四倍。改译：
Correct or improve the translation of the following English sentences.原文：The production of various electron tubes has been increased four times as
against 1958.
译文：各种电子管的产量比1958年增加了四倍。改译： 【正确答案】：
各种电子管的产量比1958年增加了三倍。
【题目解析】：本题考查倍数表达法，has been increased four times as against 1958，是 1958年的四倍，也就是说增加了三倍。increase X times as...表示“增加到 X 倍，增加了 X-1倍”。
