The population root activity of interplanting cotton decreased significantly at the square and boll stage, with the high value period delayed 15 to 25 days.

套作棉花在蕾铃期群体根系活力降低，且根系活力高值期出现的时间后延15 ~ 25天，高值持续期明显缩短。

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Since pure foaming agent with short half-value period causes a poor plugging effect for high-permeability reservoir with water channeling, this paper studies on gel foam sysem.

针对纯发泡剂半衰期较短、对已形成注入水窜流通道的高渗透储层封堵效果较差的实际问题，开展了凝胶泡沫体系的研究。

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The percentage of assessed value that was paid as property taxes to the city, however, did not change from year to year during this period.

但是，在此期间，作为城市缴纳的财产税的评估值的百分比逐年没有变化。

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This is the present value of $1 in one time period, which I'm taking to be a year.

这就是一美元在一段时期内的现值,我只是将一美元持有一年

耶鲁公开课 - 金融市场课程节选

Over the boom period, we've been seeing a gradual uptrend; just as loan to value ratios were only 60% in the 1920s, now they're up to 90% or 100%.

在繁荣时期可看到一个逐渐上升趋势,上世纪20年代贷款价值比率只有60%,现在飞升至90%或100%

耶鲁公开课 - 金融市场课程节选

I bought a number of two-period bonds such that the value of my purchase exactly equals the proceeds that I get from shorting the one period bond, so I've made a zero wealth transaction.

我买入了一定数量的两年期债券,其成本刚好等于我卖空,一单位一年期债券获得的资金,我做的是零成本交易

耶鲁公开课 - 金融市场课程节选

Even the best performing big banks have lost a third of their value in that period.

ECONOMIST: The world's best banks

But 42 of the 71 MPs have not had to repay anything, as their properties fell in value over the period.

BBC: MPs repay ?390,000 in 'profits' on second homes

Despite paying just under 5 million last year, Elzanaty seems to believe that the property has quadrupled in value over the period the group has held the asset, despite some nasty market conditions.

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