understudied       
adjective uk/ˌʌn.dəˈstʌd.id/ us/ˌʌn.dɚˈstʌd.id/
 研究不足的,探讨不够的
An understudied subject has not been studied as much as it should be or as much as you would expect.
  The terrapin is a surprisingly understudied species. 对水龟这个物种研究不足,令人惊讶。 
 Heart disease in women has been understudied for years. 多年来,对妇女心脏病一直存在研究不足的问题。 
 - More examples
 - DHEA (dehydroepiandrosterone) is an understudied hormone.
 - Until now, the topic of absentee ballots has been understudied and underanalyzed.
 - This protein has been linked to a rare and understudied allergy to maize.
 - The book shines a new light onto an understudied part of her art.
 - "People in the African American community suffer worse disease at about every level," Thornburg says. "It's terribly understudied."