摩尔分数或比率，但它是有单位的。
1999年1月1日11个国家的货币跟一种新货币，即欧元的比率固定下来，欧元也成为批发金融市场中的结算单位。
On January 1st 1999 the currencies of 11 countries were fixed against a new currency, the euro, which became the unit of reckoning in wholesale financial markets.
确定测量单位——以测量的术语来表达控制对象，如数量、比率、指数、权数等等。
Define a unit of measure - express the control subject in measurable terms such as quantities, ratios, indices, rating etc.
正如许多国家的公用事业单位一样，PPWASA雇佣了太多这样的员工——在过去每1000条线路中有20条线路是雇佣这样的员工，而现在的比率是3/1000。
As in public utilities in many countries, PPWSA employed too many of them—some 20 per 1, 000 connections compared with about three per 1, 000 now.
我们发现，在我们研究的这两年内，交易员的夏普比率大幅提高。这表明他们在不断学习如何提高单位风险的盈利。
We found traders increased their Sharpe ratios significantly during the two years of the study -indicating they were learning to make more money per unit of risk.
其高扭矩比率允许使用较小直径的单位联连接速度较低的高速应用。
Their high torque ratings permit use of smaller diameter units which lower contact velocity on high speed applications.
分贝通常表示两个声音信号或电力信号在功率或强度方面的相对差别的单位，相当于两个水平的比率的常用对数的十倍。
A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels.
从技术角度来说，它是用单位人工或者单位工作时间来衡量的单位产出与单位投入的比率。
Technically 2 it is the rate of output per unit of input 3 measured per worker or by the number of hours worked.
从技术角度来说，它是用单位人工或者单位工作时间来衡量的单位产出与单位投入的比率。
Technically 2 it is the rate of output per unit of input 3 measured per worker or by the number of hours worked.
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