Guinness World Records吉尼斯世界纪录
2020-04-06
阅读(快乐英语高年级) 2020年12期
关键词:吉尼斯世界纪录
Scientists in the UK made the smallest Christmas card in November 2010. The card is 200 micrometers(微米)wide and 290 micrometers tall. Your hair is about 100 micrometers wide.