pounding up machine

例句：

1. 1. The machine is pounding up the metal to make it stronger.
   机器正在给金属增加重量以使其更坚固。
2. 2.The workers are pounding up the concrete to build the new bridge.
   工人们正在给混凝土增加重量来建造新桥。
3. 3.The company is pounding up its profits by increasing prices.
   公司通过提高价格来增加利润。