検索内容:
number
The number of people present was impressive.
(physics, chemistry, rare) atomic number
The atomic number of carbon is 6.
in force, in droves, in large numbers
They came in droves to the demonstration.
real number
A real number can be positive or negative.
rational number
A rational number can be expressed as a quotient of two integers.
natural number
A natural number is a positive integer.
quite a few
The number of people present is quite high.
Oxidation number.
The oxidation number of iron in Fe2O3 is +3.
(mathematics) square number
The square number of 9 is 81.
(number theory) prime number
The prime number is an integer greater than 1 that has no positive divisors other than 1 and itself.
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