X alloy

例句：

1. 1. The X alloy is stronger than steel but lighter.
   这种合金比钢更强壮但更轻。
2. 2.The X alloy was used in the construction of the bridge.
   这种合金用于建造桥梁。
3. 3.The X alloy is often used in the production of tools and machinery.
   这种合金常用于生产工具和机械。