opencast发音形容词1露天开采的、露天的英式;矿业The village sits close to a large opencast coal mine.那座村庄就在一座大型露天煤矿附近。副词1以露天方式英式;矿业Most of the copper here is mined opencast.这里的铜矿大多以露天方式开采。名词1露天矿、露天开采英式Local residents opposed plans for a new opencast near the river.当地居民反对在河边开设新露天矿的计划。用这个字练口说→