Conclusions Although lead poisoning rate of the children was low in Hefei, health education for lead prevention should be strengthened in order to improve public awareness on lead protection.

结论合肥市儿童铅中毒发生率较低。但仍需要加强铅防护工作的宣传教育，提高群众的自我保护意识。

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"Rich countries have to lead - by reducing agricultural protection, by cutting high manufacturing tariffs, and by expanding access to affordable medicines," says Stern.

斯特恩说：“发达国家必须带头，减少农产品保护，降低工业品的高关税，扩大价格适当的药品的准入。”

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President Obama praised the Iraqi security forces which took the lead in providing protection for voters.

VOA: special.2010.03.13

Political considerations always influence decisions that lead to protection.

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And he will be joined in that effort by my nominee to lead the Environmental Protection Agency.

WHITEHOUSE: Remarks by the President in Personnel Announcements

The organization funded the two vaccines -- created by Jonas Salk and Albert Sabin -- that would lead to the protection of most of the world against polio.

CNN: Why polio hasn't gone away yet