lay steel

例句：

1. 1. The train is laid with new steel tracks.
   火车正在铺设新的钢轨。
2. 2.The construction crew is laying steel rails for the bridge.
   施工队正在为桥梁铺设钢轨。
3. 3. The engineer carefully laid the steel rails to ensure stability.
   工程师仔细铺设了钢轨以确保稳定性。