extra soft steel

例句：

1. 1. This new car has an extra-soft steel body that provides excellent protectionfor passengers.
   这款新车拥有超软的钢铁车身，为乘客提供了出色的保护。
2. 2.The construction of the bridge required extra-soft steel to withstand the high loads.
   建造这座桥梁需要使用超软的钢铁来承受高负载。
3. 3. Theengineers used extra-soft steel to make the machinemore durable and efficient.
   工程师们使用了超软的钢铁来使机器更加耐用和高效。