range period的意思|示意

The average incubation period is four days, but can range between two and 10 days.

潜伏期平均为4天，但可为2天或10天不等。

Depending on the application's popularity, attacks can range from only a few an hour to several hundred or thousand in the same time period.

根据应用程序的流行度，攻击幅度可以为一小时攻击几次至同一时间段内攻击数百甚至数千次。

The broader question is whether what worked for Yale and Harvard, for a time, can be a successful strategy for a much broader range of universities over a much longer period.

更大的问题在于，耶鲁和哈佛一时行之有效的策略，能够长期造福更多的大学么？

The U. S. Federal Reserve has left its benchmark rate in a range of zero to 0.25 percent and reiterated its pledge since March 2009 to keep rates very low for an "extended period."

美国联邦储备委员会已经将利率基准范围设在0到0.25%之间，并重申“自2009年3月起将维持非常低利率”期限延长。

However, the amplitudes of ERG were sustained in normal range during the study period.

而ERG的波峰值在观察期内维持在正常范围。

The Fed kept its main interest rate in a target range of 0-0.25% and stuck to its creed that rates would need to stay low for “an extended period”.

联储保持目标基准利率在0-0.25%之间，并将“长时间”停留在低水平。