名词
中文翻译：主剂
同义词：
['primary compound', 'principal component']
例句：
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1. The lead compound in the paint is toxic to humans.
油漆中的铅化合物对人类有毒。
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2. The primary compound of this compound is carbon dioxide.
这种化合物的主要化合物是二氧化碳。
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3. The lead compound was used to make the paint more durable.
铅化合物被用来使油漆更耐用。