clean up sth的用法和樣例：
例句
- The waiters are said to pick up a fair amount in tips.
據說服務生能賺得數量相當可觀的小費。 - Halfway through last year it was sitting on big gains on chartered-in vessels, so it doubled up the bet that charter costs would rise and went long FFAs.
去年年中，中遠在租用船舶業務上賺得盆滿缽滿，於是，該公司將籌碼翻倍，押注租船費將上升，並買入遠期運費協議。
