The rate of spread of a virus would therefore be limited by how quickly it could replicate in each cell.

因此，它在每个细胞中复制的速度会限制病毒传播的速度。

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But more significant is the decline in the death rate, or deaths spread across miles of driving — long division that helps smooth out effects of economic cycles.

不过，死亡率的下降，也就是按英里数计算的死亡人数的下降更为重要，因为这种计算方法有助于消除经济周期的影响。

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Another study discovered that, as cable television spread, the fertility rate in rural India dropped by as much as if women had received five additional years of education.

另一项研究发现，随着有线电视的普及，印度乡村地区的生育率降低的程度相当于妇女再接受五年的额外教育。

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Days after Mexico suspended public activities virus,testing it, flu, to reduce the spread of swine flu, the country is reporting a leveling off in the rate of new infections.

VOA: standard.2009.05.03

His strategy is unusual among cancer researchers, who have tended to focus on identifying cancer-causing genes rather than writing differential equations to describe the rate of tumor spread.

FORBES: Ideas & Opinions

But given the size of those reserves, and the banks overwhelming need for income, it might not take much in the way of interest rate spread expansion to get some monetary inflation of the double digit variety from these banks.

FORBES: Monetary Watch June 2011, Inflation prospects post QE II

But such investments have been earning the benchmark rate minus some spread of late.

FORBES: Written by By Drew Hofler