積壓航班
flight backlog
例句：
A massive flight backlog was growing and scientists feared that history could repeat itself with yet another volcanic eruption in Iceland.
積壓航班數(shù)量非常大且呈上升趨勢(shì)，科學(xué)家擔(dān)心如果冰島再有火山噴發(fā)，這一歷史將重演。
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