machine for trenching and burying pipe

例句：

1. 1. The machine is designed to make the work easier.
   这台机器设计用来使工作更容易。
2. 2. He used a machine to cut the wood into pieces.
   他使用一台机器将木头切成了块。
3. 3.The engineers are working on developing a new machine for the factory.
   工程师们正在为工厂开发一种新型机器。