order of magnitude

劍橋詞典

the approximate size of something, especially a number
（尤指數(shù)字的）數(shù)量級，大小
The country's debt this year will be of the same order of magnitude as it was last year . 今年該國的債務(wù)與去年相比在同一數(shù)量級上。
mathematics   specialized
a level in a system used for measuring something in which each level is ten times larger than the one before
成指數(shù)增加的，以十倍爲(wèi)單位增加的
These processor speeds have recently increased by two orders of magnitude (= by a hundred times ). 這些処理器的速度最近增加了兩個指數(shù)單位（一百倍）。 返回 order of magnitude