1. An area of land or territory that has not been thoroughly investigated, researched, or examined by scholars or explorers
The Amazon rainforest still contains many unstudied regions where new species are discovered regularly.
A floresta amazônica ainda contém muitas regiões inexploradas onde novas espécies são descobertas regularmente.
2. A geographical area about which little scientific knowledge or data has been collected
Deep ocean trenches represent largely unstudied regions of our planet.
As fossas oceânicas profundas representam regiões pouco estudadas do nosso planeta.