因为一直到现在我们都是在看图像，而且知道它们，是相切的，但是为什么在一般情况下它们都相切？
Because so far I have shown you pictures and have said see they are tangent.But why is it that they have to be tangent in general?
对，一直到现在，很多当年在昆明的人在北京见到我还会说那时候他们看到我贴的寻人启事了，而且不光是昆明本地人，还有很多在昆明玩、出差的人。
Yes. Since then, many people who were in Kunming at that time met me in Beijng and said that then they saw my notices. And those people are not just local and also played and on business in Kunming.
对，一直到现在，很多当年在昆明的人在北京见到我还会说那时候他们看到我贴的寻人启事了，而且不光是昆明本地人，还有很多在昆明玩、出差的人。
Yes. Since then, many people who were in Kunming at that time met me in Beijng and said that then they saw my notices. And those people are not just local and also played and on business in Kunming.
应用推荐