The interesting thing is that on Earth at least it needs highly acidic water to form.

有趣的是，至少在地球上它需要强酸性的水来形成。

youdao

The environment is highly acidic in deep wells. "That means there's a lot of hydrogen in the environment, " he said.

深井下的环境是呈高酸性的，即意味着在这样的环境中有大量的氢存在。

youdao

They are highly acidic - but what makes them particularly damaging is they stick to the teeth, compounding the damage.

它们是强酸性的——然而更为特别的是，干果容易粘在牙齿上，从而加重了这种危害。

youdao

Although occasionally not acidic when flowing through and over carbonate rocks, mine waters are generally highly acidic.

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