youdao

Still, her professional services were considered an essential element of the medical regimen at India's famous Arya Vaidya Chikitsalayam, the Mayo Clinic of traditional Indian medicine.

NPR: Excerpt: 'The Healing Of America'

The quality of provision is an essential element and this quality can only be ensured by providing adequate systems of professional training for the teachers involved in the programme.

UNESCO: The Basic Competence in Working Life Programme

But she said that there was an element of creating a separate identity as a teacher in the classroom - a "professional persona" with a way of dressing, speaking and modelling forms of behaviour.

BBC: Who's the comedian in the classroom?