it just does one rotation on its axis for each revolution it makes around the earth, so it keeps the same side facing the earth.
(it; just does; one rotation) (each revolution; makes; L:around the earth) (it; keeps; the same side facing the earth) (the same side; facing; the earth)
it each revolution it the same side
just does makes keeps facing
one rotation
L:around the earth
the same side facing the earth
the earth