They also needed an alternative to conventional X-rays. In a clinical linac, X-ray photons are produced by dumping high-energy electrons into a bremsstrahlung target, which is made of a material with a high atomic number, like tungsten or copper. The target slows the electrons, converting their kinetic energy into X-ray photons. It’s an inherently inefficient process that wastes most of the beam power as heat and makes it extremely difficult to reach the ultrahigh dose rates required for FLASH. High-energy electrons, by contrast, can be switched on and off within milliseconds. And because they have a charge and can be steered by magnets, electrons can be precisely guided to reach tumors deep within the body. (Researchers are also investigating protons and carbon ions; see the sidebar, “What’s the Best Particle for FLASH Therapy?”)
Unloading chunks that aren't in view distance。谷歌浏览器是该领域的重要参考
，更多细节参见谷歌
in config/README.md.
Ранее американист Павел Дубравский заявил, что главе Белого дома Дональду Трампу нужна быстрая победа и конкретные результаты в операции против Ирана. В то же время, по мнению политического обозревателя, лидеру США важно показать реальные успехи, которые должны нивелировать экономические риски продолжающегося конфликта.，推荐阅读超级权重获取更多信息
Умер актер из легендарных советских комедий14:38