tin spar

例句：

1. 1.The mine is rich in tin and gold.
   这个矿富含锡和金。
2. 2.Tin is a valuable metal that is used in many products.
   锡是一种宝贵的金属，用于许多产品中。
3. 3. Tin is also used as an alloy to improve the strength of steel.
   锡也被用作合金来提高钢的强度。