水谷隼称日本队必须好好研究孙颖莎

Mongolian cyclone sparks widespread dust storms in northern China, stretching to Sichuan Basin_蜘蛛资讯网

declined in both frequency and intensity, dropping from 20.9 events per year on average in the 1960s to 8.4 in the past decade, while the average number of dust days has decreased by 1.63 days per dec

en by cold air, passing through Ningxia, Shaanxi, and Gansu, and crossing the Qinling Mountains into the Sichuan Basin. Therefore, when a westward cold-air track coincides with suitable dust source re

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