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Certified by any other country? Which?
是否获得其它国家的认证？哪些？
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So, why aren't all helmets certified by Snell?
那么，为什么不是所有的安全帽经斯内尔？
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Certified by ISO9001 International Quality Control Standard.
获得ISO 9001国际质量管理标准认证。
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Since 2007, four countries have been certified by WHO as malaria-free.
自2007年以来，已有四个国家通过世卫组织认证，境内消除了疟疾。
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The reliability of the two methods are certified by result of experiment.
实验结果证明了这两种方法的可靠性。