composition B[化] B炸药(如中国的黑梯炸药)compositionn.成分；作品；组织；作文；合成物Composition of a Plane Picture平面构成Composition analysis technique组分分析技术composition segregation region成分分离区composition analysis instrument成分分析仪器composition and characteristics组成和特征composition of classroom groups年级组合composition used KANJI terminal组版汉字终端composition of talented persons人才结构compositional colored Petri net组合着色Petri网composition of vector subspaces向量子空间的合成