Dioxygen
二氧, 分子氧
🗣️ 情景例句
I need to cancel that. We have had a last minute change of plans.
我要取消预约，我们临时改变计划了。
Wendy, I'd like you to meet my brother Sam.
温迪，我来向你介绍一下我的兄弟萨姆。
As complaints must be made in writing, the Ombudsman receives an average of 1,200 letters a year.
由于意见均需用书面形式提出，司法特派员每年平均收到1，200封信。