同义词： discipline subject subject area subject field field field of study study bailiwick
a branch of knowledge知识的分支
c branch of such knowledge某一门科学
I believe that the econometric diagnostics will be a new branch of knowledge that is cautious of theory and adequate system and worth much in practice.
作者相信:经济计量诊断理论必将发展成一门理论严谨、体系完备、应用价值广阔的新学科。
参考来源 - 经济计量建模诊断研究