underrepresentation

n.

代表名额不足；

1. Politicians of all races and ethnicities are troubled by the underrepresentation of minorities in top elective offices.
   最高选举办公室中的少数民族代表名额不足的问题困扰着所有种族和民族的政治家。

Underrepresentation of patients 65 years of age or older in cancer-treatment trials.
Underrepresentation of renal disease in randomized controlled trials of cardiovascular disease.
Women's underrepresentation in science: Sociocultural and biological considerations.
...causes of women's underrepresentation in science.
Overrepresentation and underrepresentation of African Americans and Latinos as lawbreakers on television news
Women and Information Technology: Research on Underrepresentation
VP16-dependent association of chromatin-modifying coactivators and underrepresentation of histones at immediate-early gene promoters...
Women and information technology: Research on underrepresentation
Exploring Underrepresentation: The Case of Faculty of Color in the Midwest
Underrepresentation of the risk and incidence of anaphylaxis to foods.