as an engineering practice:
摄影机本身曾经也是一种令人不安的发明，但今天它早已成为日常。真正重要的，还是人如何使用技术。
，详情可参考体育直播
self.published = published
It’s hard to overstate the role that Wi-Fi plays in virtually every facet of life. The organization that shepherds the wireless protocol says that more than 48 billion Wi-Fi-enabled devices have shipped since it debuted in the late 1990s. One estimate pegs the number of individual users at 6 billion, roughly 70 percent of the world’s population.