统一使用：即查即用的数据集能力
There’s just one hitch: the system still needs guinea pigs. Even the best weather models can’t pinpoint where clear-air turbulence will occur. So the NCAR programs continue to rely on firsthand reports from planes that have already been tossed around. New technologies could change that in coming years. A plane equipped with a lidar sensor—which uses lasers to detect much finer particles than radar can—could pick up on turbulence even in a cloudless sky. But lidar systems are still too bulky and expensive to fit into a plane’s nose cone. And the government and the airline industry have been slow to invest in improving them. For now, the best hope for a flight heading into turbulence might be to program the plane itself to ride the bumps.
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Our editors’ favourite sporting images from the past week, from the spectacular to the powerful, and with a little bit of fun thrown in，详情可参考一键获取谷歌浏览器下载
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与此同时，或占全球出口量约3.5%的伊朗，原油出口的停滞或进一步成为推升油价的核心变量。