This model introduces the idea of choosing period and makes assumption on certain groups of people so as to more effectively calculate the gu.

该模型首次引入选择期的概念，并对一些人群的选择期作出假定，以便更加有效地定量分析风险。

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While none of these will make an immediate difference in your life style, over a period of time they will get you into the habit of choosing an active alternative to the every day things you do.

可能没有任何技巧能立即让你的生活方式改观，但通过一段时间，你就会养成选择积极的生活方式的习惯做日常生活的事。

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At present, wooden doors of the market in an unprecedented period of prosperity, building materials, wooden products, which makes choosing when we have more space, but how to choose the wooden doors?

目前的木门市场已处在空前繁荣时期，建材城里的木门产品琳琅满目，这使得我们在选购时有了更多的空间，但如何才能选购到称心如意的木门呢？

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To further the shame, it still addressed a problem in the African-American community which is real, regardless of the error of choosing a period of slavery vs. a period after slavery.

FORBES: Trying to Recover From Slavery Furor, Bachmann Repeats the Error

It would be better to pay bosses in restricted shares, which they must hold for a specified period rather than choosing when to sell.

ECONOMIST: American chief executives are not overpaid

Earlier this week, truck manufacturer Paccar ( PCAR) said its customers are choosing to hold onto aging trucks for a longer period of time, rather than replace them.

FORBES: Second-Quarter Earnings Results Aren't Really As Strong As They Appear