Mef
abbr. maximal expiratory flow 最大呼气流量
🗣️ 情景例句
I would like to introduce you to your editor.
我来介绍你认识这本书的编辑。
The old man fumbled with the key in the dark.
老人在黑暗中摸索着寻找钥匙。
Oh! She's falling off her bike. I hope she didn't hurt herself.
噢！她正从自己的自行车上跌落下来。我希望她没有摔伤。