9月20日是全国爱牙日,当天在河畔平原来了一位新朋友——牙齿建筑师。草履虫、变形虫、水母和珊瑚虫都很好奇:“牙齿是什么东西?有什么作用?”“大家好!我今天要给大家展示一种神秘的力量,它可以让你生活更愉快,更有效率。”牙齿建筑师卖力地宣传着,“从此你有更多时间玩耍,让你轻松应对复杂多变的生活环境,可以有效地保护自己。接下来我需要几个志愿者,有谁愿意来尝试?” September 20 is the national love tooth day, the same day in Riverside Plain came a new friend - dental architect. Paramecium, amoeba, jellyfish and coral are curious: “What is the tooth? What is the role? ” “Hello everybody, today I want to show you a mysterious force that can make your life more enjoyable , More efficient. ”“ Dental architect’s hard advocacy, ”“ Since then you have more time to play, so you can easily cope with complex and changeable living environment, you can effectively protect themselves. Then I need a few volunteers , Who wants to try? ”