| 1. | Some occur in organisms without evoking symptoms .
一些存在于生物体中，但不发生症状。 |
| 2. | This must be carried out without social upheaval .
这项政策必须在不发生社会动荡的情况下推行下去。 |
| 3. | The inflammation may subside spontaneously if infection does not develop .
如果不发生感染，炎症可自然消退。 |
| 4. | It is generally assumed that a reaction does not change in elevation .
通常假定反力在垂直切面内不发生变化。 |
| 5. | In physics the concept of a noninteracting particle does not exist .
在物理学的概念里，没有不发生相互作用的粒子。 |
| 6. | An equatorial methoxy group was completely inert to the grignard reagent .
位于平伏键的甲氧基，则没有这种可能，因而不发生反应。 |
| 7. | No change in atomic number is possible without a radical change in properties .
性质不发生根本的改变，原子序数的改变是不可能的。 |
| 8. | There is good evidence that pure water affects nothing in wearing away rock .
有确实的证据可以证明，清水在侵蚀岩壁上是不发生影响的。 |
| 9. | A developable surface is one that can be made from a flat sheet without any in-plane strains .
可展曲面是一个可以由平板在不发生任何面内应变的条件下弯成的曲面。 |
