1. His lack of experience in the field was evident in the amateurism of his work.
- Su falta de experiencia en el campo era evidente en el amateurismo de su trabajo.

2. The amateurism of the team was clear when they made several mistakes during the game.
- El amateurismo del equipo era evidente cuando cometieron varios errores durante el juego.

3. She was disappointed by the amateurism of the event organizers, who failed to properly plan and execute the event.
- Ella estaba decepcionada por el amateurismo de los organizadores del evento, quienes no lograron planificar y ejecutar correctamente el evento.

4. The amateurism of the band was apparent in their performance, as they struggled to stay in sync with each other.
- El amateurismo de la banda era evidente en su actuación, ya que les costaba mantenerse sincronizados entre ellos.

5. The company's reputation suffered due to the amateurism of their customer service representatives.
- La reputación de la empresa sufrió debido al amateurismo de sus representantes de servicio al cliente.

6. He was determined to overcome his amateurism and become a professional in his chosen field.
- Estaba decidido a superar su amateurismo y convertirse en un profesional en su campo elegido.