The population of the island is believed to have varied from 40,000 to 60,000 in the period from initial settlement until the mid-19th century.

从开始定居时到19 世纪中期，冰岛人口已经从 40,000 增长到了 60,000。

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If you divide the 20th century into quartiles, the period when the initial yield gap was highest (ie, bonds yielded more than cash) saw a subsequent ten-year real return from gilts of just 0.3%.

如果你把二十世纪分成四个时期，初始收益差最高的时期(例如，债券比现金收益大)之后会遇到十年金边债券净收益只有0.3%的情况。

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The period values of different sequences from different initial values in double bytes were gotten through discrete digital chaos calculation.

采用混沌的数字计算法计算了双字节不同初始值的周期。

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As you can see from the chart, the rather sharp correction from the September peak occurred during a seasonally strong period, but since the initial plunge, gold prices have again begun to edge higher.

FORBES: The Four Key Seasonal Trends for 2012

The initial public offering market is reviving after a dismal period from 2007 to early 2010.

FORBES: IPO Market Showing Signs Of Life - Even For Stodgy Industrials

Now the department will be staffed from 22:00 until 08:00 for an initial 12 month period.

BBC: Pontefract A&E department reopens overnight