传统的灭菌消毒方法存在着很多弊病，诸如灭菌温度高，时间长，存在化学残留物，对环境有污染等。

But Most of conventional sterilization techniques have some disadvantages that may limit their application extensions, such as high temperature, long time, chemical leftover, pollution, and so on.

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有充分的证据表明塑料袋已经对环境造成了白色污染。

There is sufficient evidence to show that plastic bags have caused white pollution to the environment.

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就这样，这种“后向激光”有可能提供一种对污染物质以及环境中其它分子的测量，而这种测量很难或不可能用通常的激光系统进行和研究。

As such, this "backward laser" could potentially provide measurements of pollutants and other molecules in environments that would be hard or impossible to study with conventional laser systems.

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