| 1. | They outnumbered us three to one .
他们以三与一之比在数量上超过了我们。 |
| 2. | As a result, a more even air-fuel ratio is maintained .
因此，能维持合适的空气与燃料之比。 |
| 3. | In this definition, the contrast is given by the ratio of two light densities .
对比度定义为两个光密度之比。 |
| 4. | The ratio of the crankshaft to the revolutions of the camshaft is 2∶1 .
曲轴的转速与凸轮轴的转速之比是21。 |
| 5. | The interfacial shear stress is a constant proportion of the bottom shear .
交界面的剪力与底部剪力之比是常数。 |
| 6. | The light power of the composite system is equal to the ratio of the two single light power's .
组合系统的光力则为两个单个光力之比。 |
| 7. | For example, the ratio of argon 36 to argon 40 on mars is only about one-ninth the ratio found on earth .
例如，火星上氩36与氩40之比，大致只有地球上的比率的九分之一。 |
| 8. | The ratio of stress to strain, or the stress per unit strain, is called an elastic modulus of the material .
应力与应变之比，即每单位应变的应力，叫做该材料的弹性模量。 |
| 9. | In fact, it is common practice to express the pulsar slowdown as the period divided by the period change per year .
事实上，人们通常用周期与周期年变率之比来表示脉冲星的减速。 |
| 10. | The value of goods and services is determined by the quality available compared with the number of possible buyers .
商品和劳务的价值是由现有数量与可能有的买主数目之比所决定的。 |
