All warehouse staff must wear a dust mask when handling the new packaging materials.

所有倉庫員工在處理新包裝材料時，都必須戴上防塵口罩。

Please remind visitors that masks are available at the front desk during flu season.

請提醒訪客，流感季節期間櫃台有提供口罩。

The airline provides free masks to passengers who request them at the boarding gate.

航空公司會在登機門免費提供口罩給有需要的乘客。