Dioxygen
二氧, 分子氧
🗣️ 情景例句
The truth is ... yes.
老实说……是很难。
If one sheep leap o'er the dyke,all the rest will follow.
一羊跳过沟，众羊跟着跳。
Yes. You have to practise a lot.
是的，你得大量的练习。