Ağrı kaçınılmazdır. Acı isteğe bağlıdır.
- Pain is inevitable. Suffering is optional.
Bu, isteğe bağlı olsa da hala ev ödevini yapman gerekiyor.
- Even though it's optional, you should still do the homework.
That organization depends on voluntary contributions.
- Diese Organisation ist von freiwilligen Spenden abhängig.
Participation is voluntary and free of charge.
- Die Teilnahme ist freiwillig und kostenlos.