摘要: How to brush your teeth? You should brush your teeth twice a day. First, brush your teeth the inside surface of you teeth. Always move your brush in small circles. Next brush the outside surface of y
(来源:文章屋网 www.wzu.com)
摘要: How to brush your teeth? You should brush your teeth twice a day. First, brush your teeth the inside surface of you teeth. Always move your brush in small circles. Next brush the outside surface of y
(来源:文章屋网 www.wzu.com)