Dioxygen
二氧, 分子氧
🗣️ 情景例句
Our pleasure.
非常荣幸。
Do you have some envelopes?
你有信封吗？
although what impression any other civilization would thus get from us is best left unsaid.
至于其他文明行星对我们地球会有什么印象，还是不说为好。