college teachers názory a postoje views and attitudes 2 vysokoškolští učitelé 2 Covid-19 (disease) 1 biochemici 1 biochemists 1 více ... coronaviruses 1 covid-19 1 koronaviry 1 oncologists 1 onkologové 1 pandemie 1 pandemy 1 politici 1 politicians 1 méně ...