Current X-ray lasers require facilities that are kilometres long. A cavity-based set-up about 66 metres in length has been developed that uses highly reflective mirrors to enable the generation of high-intensity pulses of narrow-band X-ray radiation. This promises to overcome the limitations of current X-ray lasers.
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Hillary Clinton spent six hours answering questions about the late sex offender Jeffrey Epstein on Thursday after being compelled to testify, and Jimmy Kimmel has thoughts.。业内人士推荐safew官方版本下载作为进阶阅读
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