| 1. | The drag is a force per unit area of the layer .
拖力是流层单位面积的力。 |
| 2. | The current is the charge flow per unit time .
电流是每单位时间流动的电荷。 |
| 3. | We must do everything to raise the per unit yield .
我们要千方百计提高单位面积产量。 |
| 4. | By the charge density we mean the per unit volume .
所谓的电荷密度是指单位体积的电荷。 |
| 5. | Reset rate is the number of times per unit of time the reset action occurs .
“再调率”表示单位时间内再调动作发生的次数。 |
| 6. | Normal or linear strain is defined as the change in length per unit length .
正改应变或线应变由每单位长度内的长度改变量来定义。 |
| 7. | Within the remainder of the dielectric the net charge per unit volume remains zero .
在电介质的其余部分，单位体积的静电荷仍为零。 |
| 8. | The radioactivity of a sample is defined to be the number of disintegrations per unit time .
样品的放射性定义为每单位时间的蜕变数目。 |
| 9. | Regenerants requirements are expressed in terms of weight per unit volume of bed .
再生剂需要量以床的单位容积所需要的再生剂重量表示。 |
| 10. | A high wear resistance is a special advantage if it permits a lower weight per unit product .
高耐磨性若能使产品减轻重量，它就有突出的优点。 |
