Based on the data of a long term field experiment of dryland crops, this article points out that yield fluctuation, expressed in fluctuating coefficient, is a regular phenomenon in dryland farming.
根据旱地作物长期田间试验数据，论述了旱作农业生产中作物产量波动性是一个规律性现象，并用波动系数加以表述。
S. scientists said recent research, the reasons for this phenomenon may lie in these species signal the immune system and way of special immune regulation yield of different elements.
美国科学家近日研究称，造成这种现象的原因可能在于这些物种的免疫系统信号方式以及特殊免疫调节分子产量的不同。
We introduced a structure equation with macroscopic parameters, which can explain both the yield point phenomenon and strain-ageing of low carbon steels.
我们提出一种新的来自于宏观量构成的理论，将低碳钢的屈服及时效现象统一于同一个理论之下。
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