阶子式全为零，即矩阵的最高阶非零子式的阶数为r。则称 R displaystyle r Clever Vocabulary: related phrases and phrases Classifying and generating get alphabetize anti-hierarchical organize arrangement arranger describe macrocosm miscatalog misclassification misclassify miscode mislabel pigeonhole shake an individual down phrasal verb shorter-checklist type kind anything out phrasal verb ... https://ocxhc.com