copper brittleness

例句：

1. 1. Copper is a metal that is brittle and easy to break.
   铜是一种易碎且容易断裂的金属。
2. 2. The copper wire was so brittle that it broke easily.
   这根铜线太脆了，很容易就断了。
3. 3. Copper is often used in electronics because of its high electrical conductivity.
   由于其高导电性，铜常用于电子领域。