The Great Wall is famous all over the world, it is one of the most remarkable symbols of China, it has long history. But as there are more and more people to visit the famous building, it has been damaged to some degree. In order to protect the great building, we should not throw away the rubbish and do not make some marks, so that we can enjoy the great building.

　　长城举世闻名，它也是中国的一个显著标志，长城有很长的历史。但是随着越来越多的人参观这座著名的建筑物，长城在一定程度上受到了破坏。为了保护长城，我们不应该到处乱扔垃圾，不要做标记，这样我们才能欣赏这座伟大的建筑。