No en balde eres el líder. Eres carismático, trabajador y decidido.It's no surprise that you're the leader. You're charismatic, hardworking, and determined.
No en balde pusimos detectores de humo. Alertaron a los bomberos del incendio.It wasn't for nothing that we installed smoke detectors. It'll it alerted the fire department to the fire.
No en balde estudiamos. Hoy tuvimos un examen sorpresa.We didn't study in vain. Today we had a surprise exam.