prior research; previous work
Used in academic, scientific, and formal writing to refer to existing studies or literature on a topic.
このテーマについては多くの先行研究がある。
There is a lot of prior research on this topic.
Based on previous work, we formulated a new hypothesis.
This study proposes a new hypothesis based on prior research.
According to prior research, this phenomenon changes with the seasons.
Chapter two reviews the relevant prior research.
There is still little prior research in this field.