Pb元素
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element pb 微量元素铅
trace element pb 微量元素铅
pb element
铅元素
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Yes that's right, the base metal element lead, Pb, or more exactly the lead-based chemical compound Pb(CH2CH3)4 added to petrol to make car engines run more smoothly.
BBC: Does lead poisoning make you violent?
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