Mg

例句：

1. 1. The battery is made of a mixture of metals and Mg.
   这个电池是由金属和镁混合制成的。
2. 2. Magnesium is an essential element for human health.
   镁是人体健康所必需的元素。
3. 3. Magnesium is often used in the production of steel to improve its strength.
   镁通常用于钢铁生产，以增强其强度。