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People in different countries have different ways of doing things. Something that is polite in one country may quite impolite in another. In Britain, you mustn't lift your' bowl to your mouth when you are having some liquid （液体） food. But it's different in China. And in Japan you even needn't worry about making noises when you have it. It shows that you are enjoying it. But it is regarded as bad manners in Britain. If you are a visitor in Mongolia, what manners do they wish you to have? They wish you to give a loud "burp（打嗝）" after you finish eating. Burping shows that you like the food.
In Britain, you should try not to put your hands on the table when you're having a meal. In Mexico, however, guests are expected to keep their hands on the table during a meal. But in Arab countries you must be very careful with your hands. You mustn't eat with your left hand. Arabs consider it very bad manners eating with left hands. So, what should you do if you are on a visit in another country? Well, just do in Rome as the Romans do. You can ask the native people to help you or just watch carefully and follow them.
