Preoxygenation
[医] 预充氧[呼吸]法
🗣️ 情景例句
But next time, please ask me in advance to make a speech.
不过下一次请事先通知我一声要做演讲喔。
This house is for rent.
此房出租。
I wrote: Best wishes for Teachers' Day!
我写道：“谨致以教师节的良好祝愿！”