【化】 catalyst precursor composition
activator; catalyzer
【计】 catalyst
【化】 catalyst; catalyzator; catalyzer
【医】 accelerant; catalyst; catalytic agent; catalyzator; catalyzer
contact substance
matrix
【计】 parent population
component; composition; constituent; ingredient
【化】 component part; composition; ingredient
【医】 component; composition; fraction; ingredient; principle