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.
// 逻辑：count（矮个子数） + （栈非空则+1，代表能看到第一个更高的人；否则+0）
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With this model of Roku Stick, you'll get sharp 4K resolution, Dolby Vision, and HDR10+, so everything you watch will display incredible quality.
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