zài / chōuxiàngdàishù / zhōng / zhěngshùhuán / shì / yíge / zhěngyù / yīnwèi / tā / méiyǒu / língyīnzǐ在抽象代数中,整数环是一个整域,因为它没有零因子。In abstract algebra, the ring of integers is an integral domain because it has no zero divisors.