order of magnitude

英 [ˌɔːdər əv ˈmæɡnɪtjuːd]

美 [ˌɔːrdər əv ˈmæɡnɪtuːd]

n.  数量级(量度物理量大小的标准，用以10为底的指数表达)

计算机

牛津词典

noun

• 数量级（量度物理量大小的标准，用以10为底的指数表达）
  a level in a system of ordering things by size or amount, where each level is higher by a factor of ten
  1. The actual measurement is two orders of magnitude (= a hundred times) greater than we expected.
     实际测量结果比我们预料的大两个量级（即一百倍）。
  2. The problem is of the same order of magnitude for all concerned.
     这个问题对有关各方的影响是一样大的。

英英释义

noun

• a degree in a continuum of size or quantity
  1. it was on the order of a mile
  2. an explosion of a low order of magnitude
  Synonym:order
• a number assigned to the ratio of two quantities
  Synonym:magnitude

双语例句

• For a commercial software product, the Business Case should include a set of assumptions about the project and the order of magnitude return on investment ( ROI) if those assumptions are true.
  对一个商业软件产品来说，商业案例应该包括一组关于项目和投资收益（ROI）的数量级的假设。
• But they give an approximate order of magnitude.
  但它们反映出了大致的数量级。
• The raw material concentration is one order of magnitude lower than the concentration in the traditional fixed state process.
  原料浓度比传统定态过程低一个数量级。
• You should aim at improving the current limits by one order of magnitude on paper.
  研究的目标应该在纸上作业把目前的实验极限提升一个数量级。
• Potentially catastrophic tsunamis, a study says, making the risk of tsunamis an order of magnitude greater than current global estimates suggest.
  一项研究说，即便是在海地等沿海地区的断层发生一般的地震也可能导致灾难性的海啸，这让海啸的风险比目前的全球估计大了1个数量级。
• Other witnesses have reported numbers of a similar order of magnitude.
  其他见证者报告的数量级类似。
• Comparing with the model-predicted values and the experimental data of conventional packed beds, KG a obtained from our experiment was approximately an order of magnitude higher.
  若与传统填充床的经验式和实验值比较，则高重力场下的KGa则大约高了一个数量级之多。
• The gravimetric hydrogen production rate exceeds that of other solar-driven thermochemical processes by more than an order of magnitude.
  而分解出氢的效率以重量计算可比其它太阳能热制程的效率高出一个数量级。
• During pre-concept phase, the development team provides a rough order of magnitude ( ROM) for proposed release content and ( not committed) target dates.
  在制定概念前阶段，开发团队提供粗数量级（ROM）的提议发布内容和（未确定的）目标日期。
• There is much less index access and no index AND'ing so that the overall performance can be one or two order of magnitude better-depending on predicate selectivity.
  只有相当少的索引访问且没有索引AND'ing，这样整体性能将提高一个或两个数量级&取决于谓词选择。