名词
中文翻译：主要金属
同义词：
['main metals', 'primary metals']
例句：
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1.The main brasses used in this process are copper and zinc.
在这个过程中使用的主金属是铜和锌。
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2.Main brasses are often used as a base for casting various metal objects.
主金属通常用作铸造各种金属物体的基础。
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3. The main brasses were discovered by accident during the mining of nearby ore deposits.
主要的金属是在附近的矿床开采过程中偶然发现的。