However, these methods are estimated according to sample variance and covariance estimators of returns.

然而，这些方法都是根据样本的变异数或报酬的共变异数估算的估计值。

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At the same time, according to sample survey and its present performance, the drives welcome the taxi calling service of the high-starred hotels and respond actively.

同时，据抽样调查和目前运行情况，驾驶员对高星级宾馆叫车业务非常欢迎，应标踊跃。

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We prepared a sample PSD layout that is designed according to the Golden Ratio and Golden Rectangle.

我们准备了遵照黄金分割比率和黄金矩形原则设计的PSD格式版面设计示例。

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Obama gains 13 points among pro-choice independent women -- who make up 9 percent of the sample -- and 9 points among pro-choice Republican women, who account for 5 percent of the sample, according to the poll.

CNN: Will her gender sway women to Palin?

According to Bain analysis, more than 80 percent of the unrealized investments in a sample of buyout funds we examined were completed between 2005 and 2008.

FORBES: Exit Pressures Are Building In Private Equity

According to web analystics service StatCounter, at the end of 2012 7.92% of its sample of three million global net users accessed the internet via Safari, while 36.42% used Google's Chrome browser.

BBC: Apple users launch privacy campaign against Google