渔塘坝北部出露的富硒碳质岩石，普遍地认为是渔塘坝硒的主要来源。
The Se-rich carbonaceous rocks in the north of Yutangba is prevalently being recognized as the main source of selenium of Yutangba.
走了差不多两英里以后，到了一个高耸的地岬上，遍地都是又湿又滑的岩石，又被海水阻挡住了，他们不禁大失所望。
What was their disappointment, when, after trudging nearly two miles, having reached an elevated point composed of slippery rocks, they found themselves again stopped by the sea.
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