Playing mobile games all day is a waste of time.
整天玩手遊是在浪費時間。
You didn't even wear that jacket. What a waste of money!
你連穿都沒穿過那件外套。真是浪費錢！
Our school wants to cut down on food waste at lunch.
我們學校想要減少午餐的食物浪費。
Leaving the classroom lights on is a waste of energy.
離開教室不關燈是一種能源的浪費。