在给定信号强度和噪声水平的情况下，以比特每秒为单位给出的最终限制是无差错通信的最大绝对速率。

The resulting limit, given in units of bits per second, is the absolute maximum rate of error-free communication given signal strength and noise level.

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比如探究气泡生长速率如何随气泡面的数目变化而变化，以及单位容量内使表面积最小化。

Those include uncovering how bubble growth rates vary with the number of bubble sides and minimizing the surface area per unit volume.

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由于地球自转速率发生偏离，因此当把地球绕中轴旋转一圈作为一个单位时，（这种偏离）就相当于一秒钟时间。

Since Earth’s rotation rate varies, so would the value of one second when it’s defined as a fraction of the time it takes for one spin of the Earth on its axis.

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