Until now. A paper published last week in Nature Geoscience reports the results of recent work using neutrino detectors to quantify the radiogenic production of heat.

直到现在，上周在发表在《自然地球科学》的一篇论文报告了最近使用中微子探测器量化放射产生热量的工作结果。

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The scanning detectors are more work to implement, but they are also more general in the sort of problems they can detect.

实现扫描检测器要做更多工作，但是它们能检测更一般类型的问题。

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Photocells activate lighting during hours of darkness and can be combined with timers and motion detectors to ensure they only work when you want them to.

光电照明激活在黑夜时间，可以用定时器和运动检测器结合起来，确保他们只工作时，你希望他们。

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The initiative, which dates back to 2005, involves an extensive network of security cameras, licence-plate readers and weapon-detectors which work together to spot threats and deter terrorist surveillance.

ECONOMIST: New York expands its counterterrorism monitoring system

Older alarm devices and panels are prone to failure and life-safety sensors such as smoke and carbon monoxide detectors must be periodically replaced to work reliably.

FORBES: A Lesson In Keeping An Elderly Parent Safe In Their Own Home