gas and air
noun [ U ] UK uk/ˌɡæs ənd ˈeər/ us/ˌɡæs ənd ˈer/ (US nitrous oxide)
麻醉混合气（氧气和一氧化二氮的混合物，吸入可减少疼痛，用于分娩或医疗检查等）
a mixture of oxygen and nitrous oxide (= a gas with a sweet smell), that can be breathed in to reduce pain, for example during childbirth or medical examinations
Hospitals have gas and air, which is inhaled and can be used at any time. 医院有麻醉混合气，可以随时吸入使用。
Gas and air can be used from the onset of your labour. 麻醉混合气可以从分娩一开始就使用。
- More examples
- He gave me gas and air but the pain just got worse and worse.
- I tried some gas and air but that made me feel sick.
- I only needed gas and air and an injection of pethidine for pain relief.