| 1. | R14 380saturated carbon tetrafluoride
饱和四氟化碳 |
| 2. | But cfc ' s remain in the atmosphere for at least 75 years before natural processes break them down
但在自然过程分解掉氯氟化碳以前，它们会在大气中至少存在75年。 |
| 3. | Standard test method for air and carbon tetrafluoride in sulfur hexafluoride by gas chromatography
用气体色层分离法对六氟化硫中空气和四氟化碳含量的标准试验方法 |
| 4. | In september 1987 , 24 nations signed an agreement in montreal , canada , to limit the production of cfc ' s
1987年9月， 24个国家在加拿大的蒙特利尔签署了一个协议，以限制氯氟化碳的生产。 |
| 5. | Standard test method for carbon tetrachloride and chloroform in liquid chlorine by direct injection gas chromatographic procedure
用直接注射法对液态氯中四氟化碳和三氯甲烷的标准试验方法 |
| 6. | Effect of vaporized perfiuorocarbon inspiration on cell apoptosis of intestine mucosa : experiment with pigs with acute lung injury
汽化吸入全氟化碳对急性肺损伤小猪小肠黏膜上皮细胞凋亡的影响 |
| 7. | The principal environmental characteristic of concern for pfcs is that they have long atmospheric lifetimes and high global warming potentials
我们最关注全氟化碳的重要环境特征是它们有较长的大气寿命和很高的导致全球变暖的潜力。 |
| 8. | The challenge for scientists and chemical engineers is to find substitutes that will be as effective as cfc ' s and that will not have some other group of harmful effects
对科学家和化学工程师的挑战，是找到与氯氟化碳一样有效井没有其他有害效应的替代物。 |
| 9. | Cfc molecule consisting of chlorine , fluorine , arid carbon atoms can be broken apart by ultraviolet light , which destroys the bond between a chlorine atom and a carbon atom
一个由氯、氟和碳组成的氯氟化碳分子能被紫外线光分解，这破坏了一个氯原子和一个碳原子之间的化学键。 |
| 10. | Users must observe this limitation on pfc acceptability by conducting a reasonable evaluation of other substitutes to determine that pfc use is necessary to meet performance or safety requirements
通过对其他替代品进行合理评价来决定全氟化碳的使用是符合性能和安全要求的使用者必须遵守全氟化碳可接受性的限制。 |
