1. Physical or mental activities that are required or essential to be performed for improvement, maintenance, or fulfillment of a purpose
The doctor prescribed the necessary exercises for her recovery.
O médico prescreveu os exercícios necessários para sua recuperação.
2. Mandatory or obligatory tasks in educational, professional, or training contexts
Students must complete the necessary exercises to pass the course.
Os alunos devem completar os exercícios necessários para passar no curso.