The Earth-moon system also has an abnormally large angular momentum per unit of mass, contained in both the Earth's spin and the moon's orbit, compared to other planet-satellite systems.
(The Earth-moon system; has; an abnormally large angular momentum per unit of mass) (unit of mass; contained; in both the Earth's spin and the moon's orbit)
The Earth-moon system unit of mass
has contained
an abnormally large angular momentum per unit of mass
in both the Earth's spin and the moon's orbit