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。
The most innovative ideas often come from listening to those closest to the customer.
The most important single aspect of software development is to be clear about what you are trying to build.
The great challenge of our time is to create a world order that is both just and sustainable.