delimiting

动词 delimit:

1. determine the essential quality of
   同义词：specify, define, delineate, delimit, delimitate
2. be opposite to; of angles and sides, in geometry
   同义词：subtend, delimit
3. set, mark, or draw the boundaries of something
   同义词：demarcate, delimit, delimitate

1. The first chapter delimits her area of research.
   第一章阐明了她的研究领域。