我们几乎无法避免这样的推论:光是由同一种介质的横向波动组成的,这种介质也是电和磁现象的原因。
Our culture is not just something we carry in our hearts; it is the very fabric of our existence.
Neither the life of an individual nor the history of a society can be understood without understanding both.
"The greatest journeys are not measured in miles, but in moments that take our breath away."