The nearside also has much more kreep-potassium, rare-earthelements, and phosphorus-according to scientists.
据科学家称,月球近地端含有更多的克里普矿物,稀有地球元素钾,还有磷。
2
Existing lasers use media ranging from crystals doped with rare-earthelements to specific mixtures of gas and even certain sorts of semiconductors.
现有的激光器使用的介质有,掺杂有稀土元素的晶体、特定比例的气体,甚至是某些特定半导体。
3
The discovery of lunar water has raised questions as to whether other resources such as helium 2 and rareEarthelements could be found on the moon as well.