利用光来传输互联网数据

短语讲解：

1. The light switches on and off rapidly and in different patterns.

switch on打开, 开动, 启动
例句：First you should switch the machine on.
你得先把机器打开。

2. Below is a receiver, which picks up the light variations and translates it back to normal data.

pick up拾起, 捡起; 抬起
例句：I would have picked it up if I had noticed it.
我如果看见的话, 我早就把它拣起来了。

3. Fraunhofer Researcher Dr Jelena Vucic says it is not important what kind of lights are used but the researchers at Fraunhofer have focused on light-emitting diode or LED lights, because they believe it is the "lighting source of the future."

focus on致力于; 对(某事或做某事)予以注意
例句：Many firms are focusing on increasing their markets overseas.
许多商行都专注于扩大国外市场。

4. Dr Vucic says that to transfer the data a modulator was attached to the LED lights, which made them switch on and off rapidly, much faster than the eye can see.

attach to (使)贴〔系, 粘〕在…上
例句：The written directions are attached to the tool.
这个工具附有使用说明书。

5. We are not fighting against Wi-Fi as a matter of fact.

fight against与…作斗争〔争吵〕; 反对…
例句：We will have to fight against difficulties.
我们将不得不同困难作斗争。

6. For example, many hospitals don't allow Wi-Fi Internet in areas where is could interfere with sensitive equipment.

interfere with干预, 阻挠, 妨碍, 阻止
例句：The noise interferes with my work.
这噪音妨碍我的工作。

7. The researchers at Fraunhofer hope that within a few years all such areas will be connected wirelessly with Visible Light Communications technology.

connect with与…连接
例句：You must connect this wire with that one.
你必须把这条电线和那条接起来。

8. Your data can be very easily spied, hacked, because radio waves can go through walls.

go through穿过, 通过
例句：The river goes through the city.
这条河流穿过这个城市。