cadmium-free zinc

例句：

1. 1. This zinc alloy is used inthe production of bicycle frames.
   这种锌合金用于自行车框架的生产。
2. 2. Thesteel is made from ablend of iron and carbon,which makes it stronger and more durable.
   这种钢是由铁和碳混合制成的，这使得它更强大、更耐用。
3. 3.The new alloy has been developed toreduce the environmental impact of mining andsmelting.
   这种新合金的开发旨在减少采矿和冶炼的环境影响。