当代码被编译或者解释运行时，“0.1”已经被近似转化为这种形式下最接近的一个浮点数，这导致在计算还没有真正开始之前，一个微小的舍入误差就已经存在了。
When the code is compiled or interpreted, your "0.1" is already rounded to the nearest number in that format, which results in a small rounding error even before the calculation happens.
在许多情况下，舍入误差是可以控制的，即使在很复杂的计算，使得上部6 - 8位小数是正确的。
In many cases, the round-off error can be managed, even over really complex computations, such that the top 6-8 decimal places are correct.
这种情况下，超时应向上舍入到可能的最小超时。
In this case, the time-out should be rounded up to the minimum time-out possible.
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