观测资料存在明显的年周期变化。
There are obvious yearly periodic variations of baseline data.
我们的所记所学贯穿整个睡眠周期变化着。
And what we remember or learn varies throughout the sleep cycle.
“我们知道，地球的周期变化，”他说。
得出了年降水和季降水序列的周期变化规律。
The law of annual and seasonal precipitation period was given.
各主优势型对应的时间系数的周期变化主要在2～5年之间。
The time coefficient of each model has a period of 2~5 years.
地球轨道的周期性变化会影响地球的气候。
Periodic changes in Earth's orbit could affect Earth's climate.
他经历了周期性的变化。
那么周期。,周期在变化。
不过，也有人说，这只不过是一次周期性变化。
But there are those who say that this is just another cycle.
观察这些时间周期的重大变化。
在生活周期中也有变化交叉。
交流电是其方向周期地变化的电流。
Alternating current is the current whose direction changes periodically.
生猪产业的一个主要特征是产量和价格的周期性变化。
Cyclical fluctuation of production and price is the main characteristic of pig industry.
但是，在21世纪新的经济环境下，经济周期大大缩短、市场变化迅速。
But under the 21st century new economic environment, economic cycle shortens greatly, market changes rapidly.
一个主要的周期的经验正在关闭，和巨大变化即将发生。
A major cycle of experience is closing, and great changes are about to take place.
能力具有一定的生命周期，需要根据环境的变化适时地进行变革。
Capability has some life cycle and it need change with the environment changing.
与实测资料比较发现，两者变化趋势基本一致，在短周期波时吻合较好。
The theoretic model is consistent with the observations, especially for short period wave.
与实测资料比较发现，两者变化趋势基本一致，在短周期波时吻合较好。
The theoretic model is consistent with the observations, especially for short period wave.
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