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。
People who have been to the beach, will see that there is a cyclical fluctuation phenomenon of water, which is called tide.
到过海边的人们，都会看到海水有一种周期性的涨落现象，海水的这种运动就是潮汐。
It is necessary to grasp the features of moderate growth rate of economy un-der conditions of disproportional growth and cyclical fluctuation.
必须把握好经济非均衡增长和周期波动条件下适度经济增长速度的特点。
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