Following the analysis of the existing certificate revocation schemes, we propose a new certificate revocation scheme based the difficulty of resolving the Quadratic Residues problem.

在对目前已有证书状态发布方案分析的基础上，本文提出基于二次剩余难解问题的证书撤销状态发布方案。

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The problem is that the residues of chemical fertilizers and pesticides the rice contains are far above the export standards.

问题是，他们生产的大米的化肥、农药的残存量远远超出国际标准。

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Pesticides residues are a critical problem, which affect the quality of concentrated apple juice in our country.

农药残留是影响我国苹果浓缩汁质量的关键问题。

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Dr Brodin also spoke about the general problem of drug residues in waterways.

BBC: Drug residues 'alter fish behaviour'

Since then, and "despite extensive communications between FDA and appropriate Chinese authorities to correct the problem, we have continued to find residues of certain veterinary drugs or food additives that are not permitted for use in the United States, " she added.

CNN: FDA blocking import of 5 species of fish from China