Letter and Mail
Now when communicating with people,we can either write a letter or send an e-mail.We used to write a letter to somebody when we had something important to tell him.But nowadays we didn't.We usually do this by sending an e-mail.The advantages of a letter is that it doesn't need a computer,all we need are a pen and some paper.We can do this anytime anywhere.Hower,it has some disadvantages.It takes some days or even longer to get to the destination.The advantages of an e-mail are convenience and quickness,it can be received by people in a second over the Internet,and it costs less.But we need a computer and the Internet to do that.In a word,everything has its two sides,advantages and disadvantages.So do letters and mails.