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0 is an even number.

0 是偶数。

-4 is an even number.

-4 是偶数。

0 is a positive number.

0 是正数。

If A and B are positive integers, then A + B is always a positive integer.

If A and B are positive integers, then A - B is always a positive integer.

If A and B are positive integers, then A x B is always a positive integer.

If A and B are positive integers, then A $$\div$$ B is always a positive integer.

The terms "positive numbers " and "nonnegative numbers" have the same meaning.

1 is a prime number.

1 是质数。

All prime numbers are odd.

所有的质数是奇数。