Preoxygenation
[医] 预充氧[呼吸]法
🗣️ 情景例句
My pleasure, Doctor.
非常荣幸，医生。
A clear conscience laughs at false accusations.
白日不做亏心事，夜半敲门心不惊。
It is said that if anyone touches the tree, he will have bad luck; if he picks a leaf, he will die.
据说，谁要是触摸了这棵树，谁就会交上恶运；如果谁摘了一片树叶，谁就会死去。