名词
中文翻译：海底多金属结核
同义词：
['seabed polymetallic nodule']
例句：
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1.The sea-bottom multiple is a valuable resource for the country's economy.
海底多金属结核是国家经济的一个宝贵资源。
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2.The exploration of sea-bottom multiple has become a hot topic in recent years.
近年来，海底多金属结核的勘探已成为热门话题。
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3. The discovery of sea-bottom multiple has greatly increased the country's oil and gas reserves.
海底多金属结核的发现极大地增加了该国的石油和天然气储备。