In addition to the interlocking underground rhizomes, they have yet another adaptation, and it is ... well, we are back to reverse osmosis again.

除了相互交错相扣的地下走茎外，它们还有另一种进化……嗯，我们又回到了反渗透。

youdao

"Once well underground," he said, "you know exactly where you are."

“一旦到了地下，”他说，“你就知道自己在哪儿了。”

youdao

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。

youdao

The only visible water is frozen, and that is probably true of any that is hidden underground as well.

ECONOMIST: A drought on Mars

Evidence of consumer distress with public education is provided by the growth of private schools, whose proportion of total enrollments has edged up in recent years from 12.5% of total enrollment to 14.6%, and the silent spread of a well-organized underground subculture of parents who educate about 50, 000 children at home.

FORBES: Are We Spending Too Much On Education?

But it may well have leached further underground, or into the water table.

ECONOMIST: The tsunami