Being able to chastise people for using the wrong number of significant digits is basically math's equivalent of being a grammar Nazi.

到底是在讲哪个数字，但是指数的数字会指引你到底要怎麽移动小数点。

You can have more significant digits after the decimal point, for instance.

例如，小数点后可以有更多的有效数字。

Suppose I want to print out not six significant digits, but maybe 10.

假设我不想打印出6位有效数字，但可能是10位。

Given the right number of significant digits and the right unit, the final answer becomes 103 kPa.

给定正确的有效数字位数和正确的单位， 最终答案变为 103 kPa。

If it's so small that after rounding for significant digits it doesn't change our answers at all, then why not just drop it?

如果它太小以至于在舍入有效数字后根本不会改变我们的答案，那么为什么不直接放弃它呢？

Rounding our answer to the correct number of significant digits and adding the unit gives a final answer of 22.7 liters per 1.00 mole of gas.

将我们的答案四舍五入到正确的有效数字位数并加上单位给出每 1.00 摩尔气体 22.7 升的最终答案。