A COLLECTION OF GOOD WORDS
区分
Distinguishing
Learning, n. The kind of ignorance distinguishing the studious.
学问，名词。区分好学的人的那种无知。
The problem of distinguishing prime numbers from composite numbers and of resolving the latter into their prime factors is known to be one of the most important and useful in arithmetic.
素数与合数的区别问题以及将合数分解为素数因子的问题是算术中最重要和最有用的问题之一。