In order to keep healthy teeth,we have to brush them after eating any food.
我们必须在上学前吃早饭
We have to eat breakfast before going to school.We have to brush teeth after eating food to.......那个 In order to keep healthy teeth就是为了有健康的牙齿？晕。。。。你不是说“为了好的牙齿”吗？不就是和为了有健康的牙齿吗？哦，还有刚刚那个吃早餐应该是have breakfast“你不是说‘为了好的牙齿’吗？不就是和为了有健康的牙齿吗”这我知道 是因为这个句子不懂。。。。。、 好吧。。就这样吧