碱金属

例句：

1. 1. The alkali metals are highly reactiveand can react with water to form hydrogengas.
   碱金属非常活泼，可以与水反应生成氢气。
2. 2. The alkali metals are used in the production ofbatteries and other electrochemical devices.
   碱金属用于生产电池和其他电化学设备。
3. 3. Thealkali metals are also usedin the production of soap and detergents.
   碱金属还用于生产肥皂和洗涤剂。