Volatility in the article is the variance of asset return, which varies with time going, and this is also called heteroscedasticity in Econometrics.
本文所研究的这种波动性指的是资产收益的方差随时间不断变化，这在计量经济学中称之为异方差问题。
It is also noticed that the seepage coefficient reduced with time going, the time for the coefficient to become a constant during the test was about 6 days.
试验中也发现垃圾土的渗透系数随时间而逐渐减小，大约6天左右趋于稳定。
The microfauna community variety in MBR along with time going was investigated, and the indicative effect of microfauna on MBR operating was discussed meanwhile.
对MBR中微型动物群落结构随运行历程的变化进行了系统研究，并探讨了微型动物对MBR系统运行的指示作用。
With time going by, I gradually realize the importance of health.
随着时间的流逝，我逐渐意识到健康的重要性。
With time going on, the price of this kind of computer is getting lower and lower.
随着时间的推移，这种电脑的价格变得越来越低了。
With time going by, the small dream is like a city in the sky, staying in the corner of the heart.
随着时间的打磨，小小的梦想就像天空之城一样，放在心里的一角。
With time going on, more and more people communicate with others by mobile phones instead of using telephones.
随着时间的推移，越来越多的人利用手机与他人沟通，而不是采用打固定电话的方式。
With time going on, more and more Bridges will reach or approach their design service life and the structural damages will appear because of kinds of reasons.
随着时间的推移，越来越多的桥梁将达到或接近其设计基准期，或因为各种原因发生结构性损伤。
When I was little, I left every tough decision for my parents or elder brothers and sisters. With time going by, I came to realize that they could not always stand by me;
当我年纪还小的时候，我把所有困难的决定都留给父母或兄姉，随著时间的流逝，我逐渐体会他们不可能永远帮助我；
When I was little, I left every tough decision for my parents or elder brothers and sisters. With time going by, I came to realize that they could not always stand by me;
当我年纪还小的时候，我把所有困难的决定都留给父母或兄姉，随著时间的流逝，我逐渐体会他们不可能永远帮助我；
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