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。