两个市场的故事：美国电力行业如何分化（特别推荐，文末附下载链接）
【能源人都在看，点击右上角加'关注'】2020年12月，McKinsey&Company发布《两个市场的故事：美国电力行业如何分化》，在此分享给大家，欢迎转发扩散！原文（英文）免责声明：以上内容转载自ERR能研微讯，所发内容不代表本平台立场。
全球能源转型展望2021—全球和区域预测至2050（强烈推荐，文末附下载链接）
链接:见原文链接。提取码:9xhi。
收藏帖丨雅思小作文你该背的高分词汇+句式全在这里了
#学问分享官#雅思小作文如何拿高分？最核心的技巧有4点：运用精准词汇描述主要趋势对比突出展现图表逻辑流程其中，词汇运用是最最核心的，是其他三点实现的基础，根据小作文评分标准，词汇使用占据了雅思小作文25%的分数。那么在雅思小作文中，怎么通过词汇表达来提高分数呢?
纪念飞虎队和杜立特中队图片展在美举行
这是4月18日在位于美国俄亥俄州代顿市的美国国家空军博物馆拍摄的“缅怀英雄——纪念飞虎队和杜立特中队图片展”。
雅思生词破障：扫清“眼熟易卡壳”的听阅暗礁与同义替换 | vol.338
黄金搭配:on a continuum / a continuum of。笔者使用的提示词，会根据使用情况随时微调和更新升级。
《自然》（20220908出版）一周论文导读
Abstract:Blazars are active galactic nuclei with relativistic jets whose non-thermal radiation is extremely variable on various timescales. This variability seems mostly random， although some quasi-periodic oscillations ， implying systematic processes， have been reported in blazars and other AGN. QPOs with timescales of days or hours are especially rare in AGN and their nature is highly debated， explained by emitting plasma moving helically inside the jet， plasma instabilities or orbital motion in an accretion disc. Here we report results of intense optical and γ-ray flux monitoring of BL Lacertae during a dramatic outburst in 2020. BL Lac， the prototype of a subclass of blazars， is powered by a 1.7 × 108 MSun black hole in an elliptical galaxy . Our observations show QPOs of optical flux and linear polarization， and γ-ray flux， with cycles as short as approximately 13 h during the highest state of the outburst. The QPO properties match the expectations of current-driven kink instabilities near a recollimation shock about 5 parsecs from the black hole in the wake of an apparent superluminal feature moving down the jet. Such a kink is apparent in a microwave Very Long Baseline Array image.
China's efforts in ecological civilization and global environmental governance
From struggling with environment concerns to leading world efforts in environmental management， China has shown its global leadership and ability to turn vision into reality.
纪念飞虎队和杜立特中队图片展在美举行
这是4月18日在位于美国俄亥俄州代顿市的美国国家空军博物馆拍摄的“缅怀英雄——纪念飞虎队和杜立特中队图片展”。
2019年全球能源展望
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