The deadly heatwaves that have fuelled blazes and caused transport disruptions in Europe, the US and China this month have one thing in common: a peculiar shape in the jet stream dubbed “wavenumber 5”.
本月在歐洲、美國和中國引發火災、造成交通中斷的致命熱浪有一個共同點:一種被稱爲「波數5”(wavenumber 5)的獨特形態的高空急流。
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