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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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Ранее россиянам посоветовали делать перестановку мебели, чтобы освежить интерьер квартиры.
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尽管邮储银行的不良贷款率长期保持在1%以下，优于其他国有大行，但拉长视线，该指标的上扬趋势值得警惕。