Magnets are placed on the bottom of the train and on the top of the track, with the same poles facing each other (e.g. North pole to north or south pole to south).
(Magnets; are placed; on the bottom of the train and on the top of the track) (the same poles; facing; each other)
Magnets the same poles
are placed facing
on the bottom of the train and on the top of the track
each other