powder keg片語KK [ˋpaʊdɚ kɛg] /ˈpaʊdɚ kɛɡ/發音片語1一觸即發的局勢、危險的火藥桶、隱患比喻The whole region is a powder keg waiting to explode.整個地區就像一個隨時會爆炸的火藥桶。2火藥桶The soldiers stacked powder kegs behind the stone wall.士兵們把火藥桶堆在石牆後面。