1·The atmosphere has small amounts of nitrous oxide.
大气中含有少量一氧化二氮。
2·Dentists may give patients nitrous oxide so they will not feel pain.
牙医可能会给病人一氧化二氮，这样他们就不会感到疼痛。
3·Insects produce less ammonia than pig and poultry farming, ten times less methane than livestock, and 300 times less nitrous oxide.
昆虫产生的氨比猪和家禽少，它们产生的甲烷比家畜少十倍，而产生的一氧化二氮比家畜少三百倍。
4·Nitrous oxide is also a greenhouse gas.
氮化物一氧化氮也是温室气体的一种。
5·As a result: Nitrous oxide became an early form of anesthesia.
结果：一氧化二氮成为一种早期的麻醉剂。
6·70% of this was caused by methane and nitrous oxide emissions.
其中70%是由甲烷和一氧化二氮的排放造成的。
7·Soil stores organic carbon, but can emit methane and nitrous oxide.
土壤储存有机碳，但会释放甲烷和一氧化二氮。
8·It is then converted to nitrous oxide which adds to global warming.
然后又会转化成加剧全球变暖的亚硝酸氧化物。
9·About a third of global nitrous oxide emissions are from human activity.
全球的一氧化二氮排放量中大约有三分之一是由人类活动造成的。
10·Farming biofuels produces nitrous oxide. This is bad for climate change.
种植生质燃料的作物会产生笑气，反而会加速气候变迁恶化到令人笑不出来。
1·The purpose is to observe the effect of nitrous oxide in abortion.
目的观察笑气吸入在人工流产中的效果。
2·Objective To investigate the clinical effects of inhaling nitrous oxide for analgesia laboR.
目的：观察笑气吸入在分娩镇痛中的作用及临床应用效果。
3·Objective To study the application value of nitrous oxide aspiration analgesia in induced abortion operation.
目的研究笑气吸入镇痛在人工流产术中的应用价值。
4·The routine use of nitrous oxide in patients undergoing major surgery should be questioned.
接受较大外科手术的患者常规使用笑气麻醉值得商榷。
5·CNG is also beneficial in so many other ways. 40% less Nitrous oxide, 90% less hydrocarbons, 80% less carbon monoxide, 25% less carbon dioxide, all make for a healthier place to live in.
CNG也是有益的在许多其他方面。使用笑气减少40%，90%的人更少的碳氢化合物，少了80%的一氧化碳、二氧化碳减少25%，做一个更健康的地方居住。