| 1. | Scientists are not certain why the oxygen level dropped .
科学家们现在还不能断定为什么含氧量会下降。 |
| 2. | Officials say air samples show oxygen levels that can support life
官方表示空气样本中显示的氧气的含量能维持生命。 |
| 3. | Officials say air samples show oxygen levels that can support life
政府说空气样本证实现有的氧气含量可以支持生命。 |
| 4. | Q . why are high dissolved oxygen levels better than air sparging or orc
为什么高的溶解氧浓度比空气喷射或orc更好？ |
| 5. | Officials say air sample show oxygen level that can support life
官方人士称空气样本显示那的氧气能够支持生命的延续。 |
| 6. | Officials say air example shows oxygen levels that can support life
官方表示：空气取样表明这里的氧气含量足以支持生命的存在。 |
| 7. | Officials say air samples show oxygen levels that can support life
有关负责人称，地下的空气样本显示那里的氧气水平足以保证生存。 |
| 8. | Oxygen levels of 23 % can be reached very quickly and all personnel must be aware of the hazard
含氧量23 %是可以非常迅速地达到的，所有人都必须意识到这种危险。 |
| 9. | New technology that measures oxygen levels in the blood of a fetus was thought to offer a better way to tell which babies were truly at risk
人们认为，监测胎儿血氧水平这种新技术，可以更准确地表明哪个胎儿真正有危险。 |
| 10. | A large government study has concluded that monitoring fetal oxygen levels during labor does not lead to healthier newborns or reduce unnecessary caesarean deliveries
一项政府大型研究得出结论，在分娩过程中监测胎儿血氧水平对分娩更健康的宝宝、或降低不必要的剖腹产毫无益处。 |
