n. 位数；小数（decimal的复数形式）

n a proper fraction whose denominator is a power of 10
n a number in the decimal system

decimals的用法和样例：

例句

用作名词(n.)

I'll deal with decimals in the next lesson.下一堂课我要讲小数。
Which quotients are infinite decimals?哪道题的商是无限小数？

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asymptotically flat spacetime