A logarithm tells you what power a base number must be raised to in order to produce a given value.

对数说明一个底数的几次幂等于一个给定的值。

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While this doesn't sound like a big deal, the difficulty of factoring and finding a discrete logarithm forms the basis of most if not all public-key cryptography systems.

虽然听起来这并不是什么了不起的事，但分解并找到一个离散对数的困难形成了大部分公用密钥密码学系统的基础，如果不是全部的话。

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The log() function returns the natural logarithm (base E) of a number.

函数的作用是：返回一个数值的自然对数。

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Not being quite so sure ranging from believing that total feedback could be negative (an extreme view, true) through evens, to only increasing as a logarithm of CO2 levels to the consensus view of 2-4.5 oC.

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The sale's 255 lots range from a 1617 text by John Napier , the inventor of the logarithm, to 14 pages of notes penciled in 1982 by J.

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