Physical measures are based on standards, objects with known properties that serve as the official definition of the unit for measuring property such as, the meter or the kilogram.
(Physical measures; are based; on standards) (known properties; serve; as the official definition of the unit for measuring property such as, the meter or the kilogram)
Physical measures known properties
are based serve
on standards
as the official definition of the unit for measuring property such as, the meter or the kilogram