Please cover your mouth when you cough during the meeting, as several staff members are sick.

會議中咳嗽時請摀住嘴巴，因為有好幾位員工生病了。

The dentist's office sent an email reminding patients not to eat before the mouth exam.

牙醫診所寄了電子郵件，提醒病患口腔檢查前不要進食。

The flight attendant handed the passenger a towel to wipe his mouth after the meal.

空服員遞給那位乘客一條毛巾，讓他用餐後擦嘴。