... replaceable text 可取代的文字 replaced element 被替代的元素 replacement redundancy 替换冗余 ...
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海底锰结核中含有大量的锰、铁、铜、钴、镍等金属元素,被公认为是一种重要的陆地矿产替代资源。
Seabed manganese nodules contain a great deal of metallic elements such as manganese, iron, copper, cobalt and nickel, and they were thought as an important substitute resource for land ore.
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