走进山西电力交易大厅，记者看到屏幕上实时显示火电出力量、风光发电量等数据。
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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СюжетОбращение Владимира Путина
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