词典学是辞书学的一个分支学科，词典学是研究词典编纂的科学。

Lexicology, a science on dictionary compilation, is a branch of lexicography.

这本书填补了词典学方面的重大缺门。

This book fills a major gap in lexicography .

从梳理和评介过程中探析20世纪戏曲词典学史研究的价值和意义。

Some of the dictionaries are carried out in details, Therefore, to explore the significance of studying the 20th century's drama dictionary history from illustration and analysis.