Cyclical fluctuation of production and price is the main characteristic of pig industry.

生猪产业的一个主要特征是产量和价格的周期性变化。

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The experiments indicate that the amplitude of plasma optic signal and fluctuation can be used as characteristic signal for real-time monitoring and control for titanium laser welding.

上述试验结果表明，可以用等离子体光信号的幅值高低和波动大小作为焊接质量实时监测和控制的特征信号。

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The characteristic of fluctuation of domestic retail commercial prosperity is rather complicated. This phenomenon is due to the interaction and common effects of various factors.

我国零售商业景气波动的特征是错综复杂的，这一现象的出现，是多种因素相互作用、共同影响的结果。

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Their view was that although some day to day fluctuation in functional abilities was characteristic of brain damage due to cerebrovascular disease, further sustained functional improvement of a significant degree was unlikely.

BBC: Straw's statement in full