The recurring decimal 3.999... is also described as 3.9 recurring.
《牛津词典》
2. 我对你的思念就是一个循环小数。
I miss you is a repeating decimals?
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3. 分数亦可表示为有限小数或无限循环小数。
Scores can also be expressed as a finite or infinite decimal recurring decimal.
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4. 通过研究、猜测，提出了循环小数特征值的概念，给出了一系列重要命题。
This paper, by studying and guessing, has advanced the concept of the characteristic value of the prime recurring decimal, and given a series of important propositions.
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5. 通过研究、猜测，提出了循环小数特征值的概念，给出了一系列重要命题。
This paper, by studying and guessing, has advanced the concept of the characteristic value of the prime recurring decimal, and given a series of important propositions.
