She asked 125 undergraduate students to rank two groups of photographs, one of men and one of women, in order of attractiveness.

她请125名大学生按漂亮程度排列男女两组照片。

They do this by giving prefixes to compounds for the number of carbons in a chain, suffixes based on parent functional groups, and ranking functional groups somewhat arbitrarily for precedence.

他们通过为链中碳原子数的化合物添加前缀、基于母体官能团的后缀以及在某种程度上任意排列官能团的优先级来做到这一点。