求翻译：收益序列本身几乎不呈现出相关性，而收益的平方序列却表现出比较明显的相关性，反映不同时间上的观测值存在有非线形关系，收益的波动呈集簇性，即有的时期呈一致高波动，而有时呈相同的低波动。是什么意思？

Return series itself showed almost no correlation for the benefit of the square of the sequence comparison has shown a significant correlation, reflecting the different times of observations on the existence of non-linear relationship between earnings volatility clustering was, that was some time co

sequence proceeds almost not showing itself, and relevance of the Square sequence proceeds are showing an obvious relevance to reflect different time observing value exists in non-linear relationship between the volatility, and proceeds to cluster, that is, the period of consistent high fluctuation,

Income sequence itself does not present the relevance nearly, but an income square sequence displays the quite obvious relevance actually, reflected in the different time the observed value existence has the non-linear relations, the income undulation assumes a collection bunch of nature, namely som

Return sequence itself hardly presented a correlation, and gains sequences showing the square of the more significant correlation, reflecting different time observation values on non-linear relationship exists, earnings volatility is set of clusters, that is, some high volatility during the period,

Income array hardly demonstrates the relevance, but the square of array of the income demonstrates more obvious relevance, reflect there are non- linear relations in the observed value at different time, the fluctuation of the income presents sex of collecting forming a cluster, the period when has