所表现出的最终数值舍入到小数三位。
The final numerical values, as displayed, were rounded off to three decimal places.
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.
8这样的补充，32位的类型会溢出，您将需要重新规范正确舍入和移位。
After 8 such additions, the 32-bit type would overflow and you would need to re-normalize by rounding and shifting right.
如果第一个要舍入的数是5，后面其他的位都是0，那么这个数就会被舍入到最近的偶数。
If the first non-significant digit is 5, and all subsequent digits are 0, the last significant digit is rounded to the nearest even digit. See the example that follows.
如果第一个要舍入的数是5，后面其他的位都是0，那么这个数就会被舍入到最近的偶数。
If the first non-significant digit is 5, and all subsequent digits are 0, the last significant digit is rounded to the nearest even digit. See the example that follows.
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