柯林斯词典proper fraction 1. N a fraction in which the numerator has a lower absolute value than the denominator, as or x/(3 + x²) 真分数 返回 proper fraction剑桥词典a fraction in which the number below the line is larger than the number above it （数学中的）真分数 3/4 and 5/8 are proper fractions . 3／4和5／8都是真分数。 返回 proper fraction