【机】 standard analysis
criteria; level; mark; measure; normal; par; rule; standard; criterion
【计】 etalon; normal; STD
【化】 standards
【医】 norm; normo-; rubric; standard
【经】 denominator; norm; standard
component; composition; constituent; ingredient
【化】 component part; composition; ingredient
【医】 component; composition; fraction; ingredient; principle