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Thirty years ago, atmospheric scientists began to notice a worrisome trend. They knew that turbulence from storms increases in summer, when hotter and more humid air rises to form thunderheads. And they knew that clear-air turbulence increases in winter, when the temperature drops dramatically at the poles but not in the tropics. That temperature difference drives the jet stream, which creates turbulent eddies and wind shear as it rushes through slower bodies of air. But, on top of these seasonal swings, there seemed to be an over-all trend as well: Earth’s atmosphere was getting rougher.，这一点在旺商聊官方下载中也有详细论述
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明明：这种差异化设定旨在构建“压舱石+新引擎”的区域经济新格局。经济大省被赋予“挑大梁”的重任，通过保持较高增速目标来稳定全国经济大盘，并利用其产业基础优势率先发展新质生产力，成为高质量发展的主引擎。