单语范例（未经PONS编辑处理）
She worked as a psychology professor and family therapist and often participated in peace demonstrations and causes relating to the rights of farm workers.
en.wikipedia.org He was also invited to several educational institutions to deliver lectures on music, quite often with live demonstrations.
en.wikipedia.org Public outcry peaked in 2001, with a demonstration gathering 40,000 people.
en.wikipedia.org He gave numerous lectures and demonstrations for the members of the society and organised courses for the public.
en.wikipedia.org It also includes various events such as a karate show and a police dog demonstration.
en.wikipedia.org