【化】 basic standard
base; foundation; elements; radical; root; substructure
【医】 foundation; fundament; ground
【经】 foundation; ground work
criteria; level; mark; measure; normal; par; rule; standard; criterion
【计】 etalon; normal; STD
【化】 standards
【医】 norm; normo-; rubric; standard
【经】 denominator; norm; standard