这种原始的砂矿开采形式至今还在一些地方用来淘金。
This primitive form of placer mining is still used in some places for panning gold.
较重的物质可在水中与较轻的物质分离，砂矿开采正是利用这个原理。
Placer mining is based on the FACT that heavier substances can be separated from lighter ones in water.
这一现实已经引发了对开采利用油砂矿对气候变化的影响方面的担忧。
This fact has raised concerns about the impact of oil sands on climate change.
开采油砂矿的批评者们说，这两种方法都威胁到当地的河流，毒死了鱼类，破坏了景观，杀死了野生动物，污染了空气。
Both methods, say the tar sands' critics, threaten local rivers, poison fish, destroy the landscape, kill wildlife and pollute the air.
露天开采海滨砂矿和从岸上打井开采海底矿产资源，必须采取有效措施，防止污染海洋环境。
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.
很久之前，奥特曼是个富裕的开采金砂矿的小镇。
提出了一种用气举和自激振荡脉冲射流相结合的方式开采潜水层滨海砂矿的新方法。
The method using the airlift assisted with the self oscillation pulsed jet for dredging in the Three Gorges Reservoir Region has been presented.
提出了一种用气举和自激振荡脉冲射流相结合的方式开采潜水层滨海砂矿的新方法。
The method using the airlift assisted with the self oscillation pulsed jet for dredging in the Three Gorges Reservoir Region has been presented.
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