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.
应用推荐