has dimension has unit 単位を持つ has value 値を持つ mass fraction massafractie concentration (w/w) w mass fraction unit quantity 量 dimensionOne gram per gram gram per gram gram per hectogram gram per hectogram gram per kilogram gram per kilogram kilogram per kilogram kilogram per kilogram microgram per hectogram microgram per hectogram milligram per hectogram milligram per hectogram milligram per kilogram milligram per kilogram one parts per million percent procent 百分