"One of the really frustrating things for patients with fibromyalgia is that there's nothing to measure in labs or in X-rays.

VOA: special.2011.08.02

Well, we can't guarantee with UV light we'll have enough energy to eject every single electron, so that's why when we use x-rays, they're higher energy, you can pretty much be guaranteed we're going to eject all of those electrons there.

好，我们不能保证紫外光有足够的能量,激发出每一个电子，所以我们要使用，X，射线，它的能量更高，你可以非常确定,我们可以激发出其中所有的电子。

麻省理工公开课 - 化学原理课程节选

But for now let's simply say that we have a diffraction which we know occurs only by wave-like behavior and it involves the use of x-rays. Why x-rays?

但现在让我们来简单假设一下,我们知道,只波才发生衍射,而且衍射涉及了X光的使用，为什么是X光？

麻省理工公开课 - 固态化学导论课程节选

Previous attempts to quantify black holes' spins have attempted to analyse these X-rays - accounting for the violent processes within that can stretch and distort the X-rays' energies.

BBC: First glimpse of a black hole's spin

It would necessarily be beamed energy of gamma-rays, x-rays, and cosmic rays resulting either from the merger of two neutron stars.

FORBES: Decoding A Great Earth Die-Off: Was A Gamma-Ray Burst Really The Trigger?

Powerful x-rays a thousand billion times stronger than a hospital x-ray machine can reveal the daily growth rate of teeth.

BBC: How scientists recreated Neanderthal man