托福詞匯之Light Fidelity

　Imagine only needing to hover under a street lamp to get public internet access, or downloading a movie from the lamp on your desk. There's 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).

　　想象一下這樣的場景，在街燈下走兩步就能連入公共區(qū)域因特網，通過桌上的臺燈就能下載電影?，F在，有這樣一種新技術就可以解決上述這些高速無線網絡連接的需求問題。這種新技術叫做Li-Fi(光保真)技術，是用光波取代無線電波傳輸數據的技術。

　　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 doesn't work at all. Research suggests that Li-Fi has the potential to be faster, safer and cheaper than conventional WiFi technology.

　　除了能夠解決帶寬需求以外，Li-Fi相對于WiFi的優(yōu)勢還有：能夠在飛機和醫(yī)院等場合無障礙使用，甚至在WiFi不能到達的水下區(qū)域，Li-Fi也能大展拳腳。而且研究顯示，Li-Fi會比傳統(tǒng)的WiFi更快、更安全、更省錢。