Phrase
real numbers
noun
实数
real numbers is the plural of real number.
A number that can be expressed as a decimal, including both rational numbers like 2, -5, or 2/7 and irrational numbers like the square root of two.
- 1.
The limit of a convergent sequence of rational numbers, whether the limit is a rational number such as 2, -5, or 2/7 or whether the limit is an irrational number such as the square root of two or the circumference of the circle whose radius is one.
收敛有理数序列的极限
- 2.
A floating-point number.
浮点数
浮点数；收敛有理数序列的极限
In use
Every real number corresponds to a unique point on the number line.
The quadratic equation has two real number solutions.
Floating-point numbers in computers approximate real numbers.
be a real number
The solution must be a real number.
解必须是一个实数。
the set of real numbers
The set of real numbers is uncountable.
实数集是不可数的。
for any real number
For any real number x, x² is nonnegative.
Connections
Confusing words
- rational number
- 有理数 · 实数包括有理数和无理数；有理数是可以表示为两个整数之比的数。
- complex number
- 复数 · 实数不包括虚数部分；复数包含实部和虚部。
Word family
- real numbers
- plural
Learner notes
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.