manganese concretion
英
美
- 锰结核,锰质结核
双语例句
- But despite millions of dollars of investment, the commercial extraction of manganese nodules never became reality.
但是尽管拥有数百万美元的投资，锰结核的商业化开采始终未能实现。 - Unlike manganese nodules, which are like golf balls scattered across the sea bed, these deep-ocean deposits occur in small areas around extinct hydrothermal vents.
与锰结核像高尔夫球洞一样分散在海底不同的是，这些深海矿物层则在熄灭了的海底烟囱附近小范围内存在。
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