Wet means high humidity, instability, and numerous thunderstorms that bring high levels of cloudiness .
潮湿意味着高湿度,不稳定,以及数量众多的雷暴雨,并带来极大的云量。
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The wet and warm degree in middle troposphere is weakened and the convective instability in lower middle troposphere is strengthened by increasing wind speed of southern flow.