因为在内部，计算机使用一种非精确的(二进制浮点数)形式表示诸如0.1,0.2,0.3之类的小数。

Because internally, computers use a format (binary floating-point) that cannot accurately represent a number like 0.1, 0.2 or 0.3 at all.

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论述了一种结构精简且高效的浮点数蝶形运算单元设计，单元内部模块的使用效率接 近100%。

This paper presents an efficient design of butterfly unit with simplified structure. The occupating coefficient of inner modules of the unit is almost 100%.

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然而，内部形式可以显著提高浮点密集型程序的速度，而且对于很多程序来说，一致性问题几乎没有任何价值。

However, the intrinsic forms can considerably speed up floating-point-intensive programs, and for many programs, the conformance issues are of little practical value.

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And in that case, in general lists, I need to figure out what's the access time.

一些浮点数，一些字符串，一些数组内部的数组，各种各样。

麻省理工公开课 - 计算机科学及编程导论课程节选