tisic

例句：

1. 1. The steel is of high quality and strong iron content.
   这种钢材质量高，含铁量多。
2. 2. The steel is suitable for making heavy machinery parts.
   这种钢材适合制造重型机械部件。
3. 3. The steel is used in the production of automobiles and airplanes.
   这种钢材用于汽车和飞机的生产。