Data from a later mission indicates significant concentrations of hydrogen and by inference water less than a meter underground at both poles.
从后来的任务中得到的数据显示,在两极地下不到一米的地方有浓度相当高的氢,由此推断是水。
This shift is due to both improved safety standards and technology as well a move away from underground mines towards surface mining and controversial mountaintop-removal mining.
这种数据上的提高在于安全标准的提升和技术的进步,同时,地表开采和富有争议性的削山开采也使得地下开采也逐渐走到地上。
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