1. hydraulic mining of placer 
   砂矿露天水力开采
2. mining valuable minerals from a placer by washing or dredging. 
   通过从冲积矿洗涤或挖泥来提取贵重矿物的开矿。
3. A place where a placer deposit is washed to extract its mineral content. 
   砂矿开采地一个用来清洗出有用矿物的砂矿开采地
4. Yangtze Valley Planning Office 
   长江流域规划办公室
5. the particles and flakes (and sometimes small nuggets) of gold obtained in placer mining. 
   开采冲积矿获得的颗粒状和薄片状（有时呈小块状）的黄金。

查看更多例句 相关情景会话

• 1. 河谷砂矿
  valley in valley 谷中谷...valley placer 河谷砂矿...valley water 河谷水
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• 2. 河谷矿床
  洪积矿床 proluvial placer...河谷矿床 valley placer...河床砂矿riverbed placer
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