A postcard is a piece of thin card, often with a picture on one side, which you can write on and send to people without using an envelope. The front of the postcard shows a picture of the beautiful scenery，including famous spots , different buildings and so on. The back of the postcard has a few lines ,which need us to express our thoughts and feelings.We can also see from the postmark that the card was posted from whose address.Now,postcard is playing a very important role in our life,which greatly helps us communicate with others .
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