列舉事實(shí)或舉出實(shí)例來說明中心思想, 是簡單易行、具有說服力的寫作方法。

Communicating with other people by telephone is very convenient,

especially when you have something urgent. For example, if one of your family members is seriously

ill at night, and you don’t know how to deal with it and where to find a doctor, what can you do? A telephone is the answer. Dial 120 and you will get services from the hospital very
soon.