translation.en: Historically, for example, chopsticks -- according to one Japanese anthropologist who wrote a dissertation about it at the University of Michigan -- resulted in long-term changes in the dentition, in the teeth, of the Japanese public.
translation.zh: 从历史角度看，举个例子 筷子--根据一位密西根大学 发表过相关论文的 日本人类学家的观点-- 筷子导致了日本公众的 齿系，牙齿 发生了长期的变化