common battery type telephone exchange system

例句：

1. 1. The commoncold is a very common illness.
   普通感冒是一种非常常见的疾病。
2. 2. Common sense tells usthat we should not eat raw meat.
   常识告诉我们，我们不应该吃生肉。
3. 3. Commonly used tools like hammers and screwdrivers are essential for construction work.
   像锤子和螺丝刀这样的常用工具对于建筑工作来说是必需的。