The presence of these rich deposits has been known about for years, says Steven Scott, a geologist at the University of Toronto.
知道这些富矿的存在已经有多年了，多伦多大学地质学家史蒂芬·斯科特说。
The presence of these rich deposits has been known about for years, says Steven Scott, a geologist at the University of Toronto.
知道这些富矿的存在已经有多年了，多伦多大学地质学家史蒂芬·斯科特说。
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