Equinoxes occur in the orbit (revolution) of Earth around the sun when the sun's rays are perpendicular to the equator.
(Equinoxes; occur; L:in the orbit (revolution) of Earth; L:around the sun) (the sun's rays; are; perpendicular to the equator)
Equinoxes the sun's rays
occur are
L:in the orbit (revolution) of Earth L:around the sun
perpendicular to the equator