Historically, hydropower has been Chile's major power source, but hydropower is vulnerable to seasonal and climatic changes - i. e. fluctuations in rainfall quantity.

历史上，水力发电是智利主要的电力来源，但水力发电受制于季节和气候的改变，例如降雨量的波动等。

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The short-period anomalous fluctuations of observations of astronomical time and latitude before major earthquakes were discussed.

本文讨论了大地震前天文时间和纬度观测结果的短周期异常波动涨落。

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The second chapter studies the price fluctuations theories, recalls major theories and characteristics of the fluctuations of the price.

第二章为物价波动的理论综述，对主要的物价波动理论及波动特征及原因进行了回顾。

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At time of major instabilities in the Soviet Union and the Third World, of shifting Alliance perceptions, and of fluctuations in U.S. defense expenditures, it is important that U. S. defense decisions be made on an informed basis.

CENTERFORSECURITYPOLICY: Center for Security Policy | A Scorecard On The Defense Budget: Preserving Key Priorities And Programs In An Era Of Cuts