rational number
collocation有理数
Every rational number can be written as a fraction of two integers.
每个有理数都可以写成两个整数的分数。
有理数
rationals — plural of rational
先理解核心含义，再看它在真实句子里的用法。
有理数
A rational number: a number that can be expressed as the quotient of two integers.
The number 0.5 is a rational because it can be expressed as 1/2.
0.5是一个有理数，因为它可以表示为1/2。
有理数
A rational number: a number that can be expressed as the quotient of two integers.
整数或分数
an integer or a fraction
In math class, we learned that every integer is also a rational.
在数学课上，我们学到了每个整数也都是有理数。
He asked whether the square root of 2 is a rational.
他问2的平方根是不是有理数。
Choose the next layer that will help you use rationals with more confidence.
Recommended next
Missing: Usage patterns
Complete this area with usage patterns.
Includes Common mistakes & Confusing words
See typical errors learners make and confusing words to avoid.
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Also compare
有理数
Every rational number can be written as a fraction of two integers.
每个有理数都可以写成两个整数的分数。
有理函数
The graph of a rational function may have asymptotes.
有理函数的图像可能有渐近线。
有理式
Simplify the rational expression by canceling common factors.
通过约去公因式来化简这个有理式。
有理指数
A rational exponent indicates a root and a power.
有理指数表示根和幂。
有理根
The rational root theorem helps find polynomial roots.
有理根定理有助于求多项式的根。
Use rationals naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想ratio（比），有理数是能写成两个整数之比的数，如1/2；拼写rat-开头，记住‘比’的关系。
语域：formal 常见场景：数学教材、学术论文、课堂讲解 作为名词，rational 是 rational number（有理数）的简称，多用于数学或学术等正式语境；日常交流中通常说完整的 rational number。
通常用于数学语境
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.