The effects of the stress ratio in the cyclic loading and the environment medium were studied.

同时研究了循环加载中的应力比以及环境介质对于疲劳裂纹扩展的影响。

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Through the simulation of different metal connecting forms and different environment medium in practical construction, long-term observation of corrosion phenomena and degree has been done.

模拟实际工程中不同金属连接形式和不同的环境介质，对其进行腐蚀现象和腐蚀程度的长期观察，得到各种工况腐蚀程度图。

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Carrying out quality education needs right relationship of big notion (social environment), medium notion (school) and little notion (teaching).

实施素质教育需要正确处理宏观(社会环境)、中观(学校)和微观(教学)的关系。

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Carrying out quality education needs right relationship of big notion (social environment), medium notion (school) and little notion (teaching).

实施素质教育需要正确处理宏观(社会环境)、中观(学校)和微观(教学)的关系。

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