如果所提到的系统是用偏振光的形式，以一连串数字比特流编码来表示信息的话，就意味着截取并阅读信息没法再偷偷摸摸地进行了。
If the system in question is a message in a series of digital bits encoded in the polarisation of light, this means that intercepting and reading the message can no longer be done surreptitiously.
不像传统的从内部照明的显示器，电子阅读器使用的是从某方面说像照在纸上的反射光。
Unlike conventional display screens, which are lit from behind, e-readers use reflected light in a way similar to paper.
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