use up 用完，耗盡(to exhaust, finish, completely)
例句：1.Too much algae has practically used up the oxygen in this lake, thus killing off the fish.
太多的水藻實際上已用盡了湖里的氧氣，因而魚類無法生存。
2.I've used up my contact lens solution. I have to go for another bottle.
我的隱形眼鏡護(hù)理液用完了，我得再去買一瓶。