名词
中文翻译：镧
同义词：
['lanthanide', 'rare earth element']
例句：
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1.The lanthanum metal is used in the production of high-performance alloys.
镧金属用于生产高性能合金。
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2.Lanthanum is a soft, silvery-white metal with a high melting point.
镧是一种柔软的银白色金属，熔点很高。
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3. The lanthanum compound has been found to have antimicrobial properties.
这种镧化合物被发现具有抗菌性质。