It's the first study to trace the fluctuation of a natural (not human-caused) aerosol around the globe over the course of a century.

这是第一个试图勘测整个世纪地球表面自然(非人造)环境中悬浮颗粒的研究。

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The transformation course from latent human capital to actual human capital bears uncertainty and fluctuation, which is influenced by many factors.

该转化过程具有不确定性和波动性，受多种因素的影响。

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The growth course of the real estate is not the steady growth course, but the growth of the fluctuation, especially demonstrate the characteristic periodicallying increasing.

房地产业的增长过程不是平稳的增长过程，而是波动性的增长，特别表现出周期性增长的特点。

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