| 1. | For ultraviolet, nanometer is a preferred term .
对于紫外区通常用毫微米这一名词。 |
| 2. | Usually relative humidity is expressed as a percentage .
相对湿度通常用百分数表示。 |
| 3. | Mild steel is usually used for general engineering purposes .
软钢通常用在一般工程上。 |
| 4. | Levelling is usually carried out with vertical drill holes .
整平爆破通常用垂直炮眼进行。 |
| 5. | Shafts and hubs are usually fastened together by means of keys。
轴和轮毂通常用键固定在一起。 |
| 6. | The bar directions are conveniently specified by direction cosines .
杆的方向通常用方向余弦来表示。 |
| 7. | It is customary to represent a graph as a picture drawn in the plane .
图通常用平面上的一个图形来表示。 |
| 8. | Wooden barrels and water tanks are usually strengthened with metal bands .
木桶和水箱通常用金属圈来加固。 |
| 9. | The behavior of collision is usually expressed in terms of a cross section .
碰撞的行为通常用截面来描述。 |
| 10. | Disk valves are commonly used when solids are in the aerated state .
蝶阀通常用在固体处于充气状态的地方。 |
