Bioxide
二氧化物
🗣️ 情景例句
Why are you in such a good mood?
为什么你的心情那么好？
It is as well to know which way the wind blows.
识时务者为俊杰。
Good morning, nurse.I was to see the dentist,please.
早上好，护士。我想见牙科医生。