Dental decay, also known as dental caries, begins first inside the tooth. A white spot appears on the enamel where the tooth has started to weaken inside. At this stage, the tooth can repair the weakened area with the help of fluoride and minerals in saliva.
Beijing, also Peking, is the capital of the People's Republic of China and one of the most populous cities in the world. Its population in 2013 was 21,150,000. The city proper is the 3rd largest in the world.
Beijing has approximately 12 million people living in their country. People who can't afford to live in big, tall houses live in what you call small huts and in Beijing you do â¦ n't get roads you get small alley ways and little parts of a road or lanes. In Beijing you can get nice houses but you rarely find them around and you will find that either old people live in them or a family living in them but the house has been past down to them.