can have a timely sense. Then it is translated
If it is used in a timely sense it can be
substituted by después
del desayuno vamos a dar una vuelta por la ciudad.
= After breakfast we are going to have
a walk through the town.
tras can also have a local meaning. Then it is
to be translated with behind.
If used so it can be substituted by detrás
acuerdo con is similar to según