Complex sentence: In a Euclidian space a circle is a fundamental entity not dependent on any definition of length or time and therefore the CGPM definition of the second has achieved the stated objective; the definition of the second has no reference to any other base unit.
Split into simpler sentences: In a Euclidian space a circle is a fundamental entity not dependent on any definition of length or time and therefore the CGPM definition of the second has achieved the stated objective. The definition of the second has no reference to any other base unit.