Dioxygen
二氧, 分子氧
🗣️ 情景例句
You haven't answered my question.
你还没有回答我的问题呢。
How often did I tell you to speak clearly?
我告诉你多少次要讲清楚?
So he took off the second shoe and put it under his bed very quietly.
他脱下第二只鞋子，轻轻地放在床下边。