Definition (清空)
To completely empty the contents of a container or its items.
清理；徹底清空
We need to turn out the warehouse and get rid of all the old items.
我們需要清理倉庫，並處理掉所有舊物品。
Before moving, we need to turn out these boxes and empty everything inside.
搬家前，我們需要清空這些箱子，把裡面的東西全部拿出來。
She spent the whole day turning out her closet and emptying it out completely.
她花了一整天的時間清空她的衣櫥，徹底整理了一遍。