Preoxygenation
[医] 预充氧[呼吸]法
🗣️ 情景例句
I do mean it.
我的确是说真的。
Knowledge is a treasure, but practice is the key to it.
知识是一座宝库，实践是打开宝库的钥匙。
So how can I help you ? asked the detective.
那么我怎样才能帮你呢？侦探问。