起重机

例句：

1. 1. The crane is lifting the heavy load from the ground.
   起重机正在把重物从地上抬起。
2. 2. The crane operator has to be careful when operating the machine.
   起重机操作员在操作机器时必须小心。
3. 3. The crane is used for loading and unloading cargo at seaports.
   起重机被用于海上港口的装卸货物。