词汇	material line
释义	material line 物质线
随便看	abstract signal abstract signal flow model abstract signatures abstract simplex abstract simplicial subcomplex Abstracts Information Dissemination Systems abstract situation abstract social class abstracts of abstracts abstracts of academic periodicals abstracts of clas-sified reports abstracts of declassified documents Abstracts of Instructional Materials Abstracts of Master Degree Thesis4 Abstracts of medical papers abstracts of military bibliography abstracts of mining technology papers abstracts of original articles Abstracts of Research Materials abstracts of science papers abstracts of title abstract software specification abstract solution-tree abstract sound abstract source