The phenomenon of stiffness deterioration (progressive damage) beyond the peak stress has been observed in cyclic loading tests of coals, rocks, concretes, soils and sands.

峰后的刚度劣化现象(渐进损伤)在多种煤、岩石、混凝土、土和砂子的循环加载实验中已被观察到。

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It is psychological phenomenon and defined as deterioration in execution of habitual process of performance un der pressure.

是一种心理现象，定义为习惯的运动执行过程发生衰变的现象，主要与努力有关。

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The phenomenon and reason of fermentation broth deterioration of rice wine was analyzed and prevention and remediation measures were proposed to reduce loss caused by fermentation broth deterioration.

该文对引起黄酒发酵过程中酒醪酸败的现象和原因进行了综合分析，提出了预防和补救的办法，以期减少酒醪酸败造成的损失。

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