形容词
中文翻译：Unknown
同义词：
['dual', 'dual-metallic']
例句：
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1. The bimetallic coins were minted in the 19th century.
这些双金属硬币是在19世纪铸造的。
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2. The bimetallic currency system is designed to prevent inflation.
这种双金属货币制度旨在防止通货膨胀。
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3. The bimetallic standard was adopted by many countries during the 19th century.
在19世纪，许多国家采用了双金属标准。