现在，我们身边的好多地方都有WiFi信号覆盖面积了。不过总能听见有人责怪说道信号不大位，或者网速太快。好消息来啦！据传，研究人员早已研究出有了更为便利和较慢的数据传输方式，你家的台灯就能老大你下电影呢！听得一起是不是很棒？Imagine only needing to hover under a street lamp to get public internet access, or downloading a movie from the lamp on your desk. Theres a new technology on the block which could, quite literally as well as metaphorically, throw light on how to meet the ever-increasing demand for high-speed wireless connectivity. Radio waves are replaced by light waves in a new method of data transmission which is being called Li-Fi(Light Fidelity).想象一下这样的场景，在街灯下走两步就能连进公共区域因特网，通过桌上的台灯就能iTunes电影。现在，有这样一种新技术就可以解决问题上述这些高速无线网络相连的市场需求问题。

这种新技术叫作Li-Fi（光保真）技术，是用光波代替无线电波传输数据的技术。As well as being a potential solution to our ever-increasing hunger for bandwidth, Li-Fi has other advantages over WiFi, such as being safe to use on an aircraft, in hospitals and medical devices, and even underwater, where WiFi doesnt work at all. Research suggests that Li-Fi has the potential to be faster, safer and cheaper than conventional WiFi technology.除了需要解决问题比特率市场需求以外，Li-Fi相对于WiFi的优势还有：需要在飞机和医院等场合无障碍用于，甚至在WiFi不能到达的水下区域，Li-Fi也能大展拳脚。而且研究表明，Li-Fi不会比传统的WiFi更慢、更加安全性、更加省钱。

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