How can scientists detect a particle that interacts so infrequently with other matter?

科学家们是如何探测到一种很少与其他物质相互起作用的粒子的呢？

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When they detect an extended dry period, they divert their metabolisms, producing sugars and certain stress-associated proteins and other materials in their tissues.

当它们发现干旱期延长时，它们会改变自己的新陈代谢，在它们的组织中产生糖和某些与应激相关的蛋白质和其他物质。

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In mid-April,Kenya signed a deal, which will allow the United States to install radiation sensors and other equipment at its busy Mombasa seaport to detect any nuclear or radiological materials that could be smuggled in to be used in a weapon.

VOA: standard.2009.05.01

Cooperate with law enforcement and other agencies to detect and alleviate attacks.

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Dogs are now being taught to detect breast cancer from a breath tube, after an animal Dr Guest was training to detect other cancers started to warn her.

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He explained that ground-based radars are able to track objects of about 10cm (3.9 inches) and sometimes smaller, depending on altitude above the earth, while other sensors can detect particles down to about 5mm (0.2 inches) in low earth orbit.

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