常見例句雙語例句This primitive form of placer mining is still used in some places for panning gold.這種原始的砂鑛開採形式至今還在一些地方用來淘金。chinafanyi.comMechanized placer mining, with special devices for washing and separating waste from valuable minerals, is used in productive alluvial deposits.機(jī)械化砂鑛開採用於含鑛量豐富的砂鑛牀．利用專門設(shè)備來淘洗、分離廢物與有用鑛物。In conducting coastal open air placer mining or shore-based well drilling to exploit seabed mineral resources, effective measures must be taken to prevent pollution to the marine environment.露天開採海濱砂鑛和從岸上打井開採海底鑛産資源，必須採取有傚措施，防止汙染海洋環(huán)境。權(quán)威例句Dines likes, among others, mining concerns Placer Dome (nyse: PDG - news - people ) and Hecla Mines (nyse: HL - news - people ).FORBES: Magazine ArticlePlacer Dome has joined Rio Tinto and three other mining houses to form the World Alliance for Community Health.ECONOMIST: Companies and health 返回 placer mining