order of magnitude
noun
1- a class in a system of classification determined by size, each class being a number of times (usually ten) greater or smaller than the one before数量级。
1.1
- mass noun size or quantity尺寸, 大小; 量：
the new problems were of a different order of magnitude.
新问题的重要性是不同的。
1.2
- mass noun the arrangement of a number of items determined by their relative size根据大小的排列：
the items are arranged in ascending order of magnitude.
这些东西由小到大按序排列。