VOA慢速英语:巴西医生扮小丑 走街串巷用幽默疗法温暖人心助力戒毒

failure- n. - a lack of success in some effort

capitalism-n. a way of organizing an economy so that the things that are used to make and transport products (such as land, oil, factories, ships, etc.) are owned by individual people and companies rather than by the government

society-n. people in general thought of as living together in organized communities with shared laws, traditions, and values

maintain v.- to cause (something) to exist or continue without changing