Naturally occurring radiation varies depending on factors like local geology and altitude. People are exposed to additional radiation when they get an X-ray or fly in an airplane.

正常情况下的辐射量也随地理环境、海拔等因素变化。当受到X射线辐射或坐飞机时，人们就会受到额外辐射。

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People are exposed to additional radiation when they get an X-ray or fly in an airplane.

当受到X射线辐射或坐飞机时，人们就会受到额外辐射。

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Then they brought the sample back to room temperature and exposed it to an X-ray beam from the facility while using a CCD detector to record the X-rays reflected from the surface of the sample.

然后他们将样品重置于室温状态，并使其接受X射线照射，同时使用CCD检测器来记录从样品表面反射回的X射线。

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The specimen is then rotated on a mechanised platform as it is exposed to the X-ray beam, in order to build up a three-dimensional picture.

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You get an x-ray and you are exposed to the radiation for very brief instant, maybe a couple of seconds, after that the radiation goes to zero.

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