The duration value can be either a positive or negative value.

持续时间值可以是正数，也可以是负数。

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For example, when the start and end dates are changed, the duration value will automatically update.

例如，当起始日期和终止日期被更改时，持续时间值将自动更新。

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Once you have 12:34:56 as a true time-of-day value, you can add a duration value to it to yield a later time.

得到表示为一天中某个时刻的值12：34：56后，可以加上一个时期值来得到稍后的一个时刻。

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The cut in the duration and value of benefits may do something to improve the supply side of Germany's labour market, encouraging people to look for jobs rather than subsisting on state pay-outs.

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Also, mortgages have a duration (a calculation of the time it takes to get paid back) that is a variable, hypothetical duration that varies with prepayment speeds, so a short duration mortgage portfolio is not protection against a sudden increase in interest rates, because if interest rates rise the duration will rise which hurts the value of the bond.

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For example, a bond fund with a duration of 5 years can expect to decrease in value 10% if interest rates increase 2%.

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