单词：open-cast mining
open-cast mining的用法和样例：
例句
- The machine pictured above is a bucket-wheel excavator used in modern surface mining.上面影像中的机器就是被用于现代露天采矿的一辆勺轮开凿机。
- Moreover, open-cut mining had lead to serious losses of water and soil through desertification.而且，露天采矿更直接导致了水土的严重流失和土壤荒漠化。
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