The rate at which the flowing water overcomes this resistance is related to the permeability of rocks.

水流克服这种阻力的速度与岩石的渗透性有关。

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It depends on the rate at which water enters the lake, and that depends on the rainfall and the evaporation rate.

这取决于水进入湖泊的速度，而这又取决于降雨量和蒸发率。

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The rate at which hair grows can be agonizingly slow.

头发生长的速度可以慢得令人苦恼。

《柯林斯英汉双解大词典》

The other would measure the rate at which all students repay their loans, whether they complete the program or not.

VOA: special.2010.07.29

This is the starting speed, that's the rate at which it is gaining velocity, and that's how long it's been gaining it.

这是起始时的速度,这是速度的增长速率,这是加速的时间

耶鲁公开课 - 基础物理课程节选

The central bank posts an interest rate that is the rate at which these member banks can borrow.

中央银行设定一个利率,这个利率是这些会员银行可以借进的利率。

耶鲁公开课 - 金融市场课程节选

Barclays missed the call on that one, modeling the growth rate at around 3 percent quarterly.

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That puts the German unemployment rate at 8.6%, up from 7.8% the previous month.

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The algorithm was picked because it approximates the rate at which commodities like gold are mined.

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