【计】 topological sort
develop; open up; rubbings
attack; flap; pounce on; rush at; snap; throw oneself on
sort; class; classify; assort; divide; label; staple; system
【计】 categories; categorization; category
【化】 classification
【医】 classifieation; grouping; systematization; systematize; typing
【经】 classification; classifying; group; sort