underground conduit

例句：

1. 1. The engineers used underground conduits to carry the water.
   工程师们使用地下管道来输送水。
2. 2. The construction crew had to dig a new underground conduit to bypass the old one.
   施工队不得不挖掘一条新的地下管道来绕过旧的。
3. 3. The underground conduit was designed to withstand high pressure and temperature.
   这条地下管道被设计成能够承受高压和高温。