劍橋詞典used to describe a place where minerals , especially coal , are taken from the surface of the ground rather than from passages dug under it, or relating to this way of getting minerals （尤指煤）露天的，露天開採(cǎi)的 opencast mine/mining 露天鑛場(chǎng)／採(cǎi)鑛 返回 opencast