词典释义：
双语例句
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The sky may clear very abruptly, even before the passage of the surface cold front in some cases, although with kata-cold fronts the changes are altogether more gradual. 3.
天空会突然放晴，有些情况下，甚至在地面冷锋过境前就放晴了，虽然下滑锋的变化总的来说要缓和得多。