| 1. | Because these wavelengths are so small, it is convenient to express them in terms of a small unit of length .
由于这些波长很小，因而用小的长度单位来表示更方便。 |
| 2. | The unit of length is measured in number of list items
，长度单位用列表项数来测量。 |
| 3. | The kilometer is the biggest unit of length in the metric system
公里是米制中最长的长度单位 |
| 4. | Cubit is an ancient unit of length
腕尺是古代的一种长度单位。 |
| 5. | The foot is a unit of length
尺是长度的单位。 |
| 6. | The metre is a unit of length
米是长度单位 |
| 7. | A unit of length equal to either the width or the length of the hand
一掌长，一掌宽与手掌的长或宽相等的一种长度单位 |
| 8. | For the tolerance substance , we must have weight , volume and the units of length
为了度量物质，我们必须有重量，容积和长度的单位。 |
| 9. | Just as the kilometer is the unit of length , so the ohm is the practical unit of resistance
正象公里是长度的单位那样，欧姆就是电阻的实际单位。 |
| 10. | A unit of length formerly used in russia and turkey , equal to about71 centimeters ( 28 inches )
阿尔申早期用于俄国及土耳其的长度单位，约等于71厘米（ 28英寸） |
