Las visitas de los padres al internado se prefijan antes del comienzo del curso.Parent's visits to the boarding school are prearranged before the beginning of the course.
Prefijamos ampliamente la fecha de la conferencia a fin de que la mayor cantidad de gente posible pudiera acudir.We fixed the date for the conference well in advance so that as many people as possible could attend.
Deberíamos prefijar los puntos que vamos a tratar en la reunión para asegurarnos de no omitir nada importante.We should set out in advance the points we're going to cover in the meeting to make sure we don't omit anything important.