The interest rate of T-Bills is determined at each auction, depending on what bidders are willing to pay.

短期国库券的利率在每次拍卖时由投标人的出价决定。

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In other words, the concentration of at any time is given by the initial concentration, t minus the rate constant times time.

换句话说，任意时刻A物质的浓度等于初始浓度，减去常数乘以时间。

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Our guess is that with the increasing amount of platforms for t-shirt design, these design elements will reach saturation at a faster rate than ever before.

我们推测，随着T恤设计平台大量增多，这些设计元素将会以更快的速度达到饱和。

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The problem, say Winn and Power, wasn't the strategy of selling online at cut-rate prices--it was the failure to implement Winn's revolutionary retailing vision and to utilize his talents.

FORBES: Internet hype survives even when the dot-com doesn't.

Medical science is advancing at a rate that doesn't preclude the development of a treatment, but it's not clear if it will come in time.

WSJ: Iram Leon: May the Last Marathon Be The Fastest��Gusher Marathon

You need to read the speech for the full explanation, but the basic idea is that higher inflation can help push down the real cost of borrowing - the real interest rate - at times when nominal interest rates can't go any lower.

BBC: On markets and helicopters