underrepresented

adj.

未被充分代表的，代表名额不足的；

At the Margins: A Distinctiveness Approach to the Social Identity and Social Networks of Underrepresented Groups
Barriers to recruiting underrepresented populations to cancer clinical trials: a systematic review.
Why are African Americans under‐represented in medical research studies? Impediments to participation
Differing Perceptions: How Students of Color and White Students Perceive Campus Climate for Underrepresented Groups
The critical psychological states: An underrepresented component in job characteristics model research
Macrophages expressing triggering receptor expressed on myeloid cells-1 are underrepresented in the human intestine.
Diversifying Science: Underrepresented Student Experiences in Structured Research Programs
Involving minority and underrepresented women in clinical trials: the National Centers of Excellence in Women's Health
Provider roles in the recruitment of underrepresented populations to cancer clinical trials.
Paving the Way to Postsecondary Education: K-12 Intervention Programs for Underrepresented Youth, NCES 2001-205