to waste time instead of working or studying
perder el tiempo en lugar de trabajar o estudiar (perder el tiempo en lugar de trabajar o estudiar)
"If you goof off all semester, you’ll regret it during finals."
"Si pierdes el tiempo todo el semestre, lo lamentarás durante los exámenes finales." (si pierdes el tiempo todo el semestre, lo lamentaras durante los examenes finales)
to successfully communicate how you feel
to contact someone again to confirm or review something
to concentrate on your positive qualities and abilities
to begin to develop into something definite
to drive adoption or expansion of something
to go somewhere for a short vacation or break