intractable problem短语⁷⁷⁴⁹⁵ 基本例句 难处理问题 巧答问题 Chaos- based encryption has suggested a new and efficient way to deal with the intractable problem of fast and highly secure image encryption. 以混沌为基础的加密系统就为我们提供了有效的加密途径，而且提高了加密速度，增强了加密的安全性。 cnki So measuring the mass flow of the multi- component gas has been an intractable problem in flow measurement field. 所以说多组分或变组分气体的质量流量测量一直是流量测量领域中的一个难题。 cnki