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It is an old standby in the brewing industry the good beer starts with clean fresh water.
酿酒业有一句老话，好酒要从好水开始。
So there's all kinds of high-tech ways to monitor water quality throughout the brewing process.
所以在整个酿造过程中有各种高科技的方法来监测水质，
But this is a decidedly low-tech way to test for clean water.
但这种监测方法无疑没有那么高科技。
We have five crawfish controlling the water quality here.
我们用五条小龙虾控制这里的水质。
They're connected to a computer and we are following their pulse activity and movement.
它们与电脑相连，我们会关注它们的脉搏和运动。
When three or more crawfish move or change their pulse activity, we know that the water parameters have changed.
当三个或三个以上的龙虾移动，或是脉搏发生变化时，我们就知道水的参数发生了变化。
We're able to react quickly because we have the result within three minutes.
我们能够迅速作出反应，因为三分钟之内就能有结果。
But why crayfish? The Czech scientists who came up with the idea say crayfish are really sensitive to all kinds of changes in their water.
但为什么是小龙虾？提出该想法的捷克科学家说，小龙虾对水中的各种变化非常敏感。
Crayfish react very quickly to any nonspecific change, which is different to any other detectors,
小龙虾对任何非特定变化反应敏锐，这与其他任何检测器都不同，
which react to a very low concentration of pollution but only to one specific agent.
检测器材虽然可以对低浓度的污染做出反应，但只会对某类特定的物质有反应。
The scientists say they are expanding their crayfish biosensor program into other areas where clean water counts.
科学家们说，他们正在把小龙虾生物传感器项目扩展到其他需要清洁水源的领域当中。
Kevin Enochs VOA News
VOA记者凯文·伊诺克斯。
