书籍 Summit 2A - 第 2 单元 - 第 4 课

(of a person or organization) using a great portion of their income in order to provide social useful services

慈善

activity that requires physical or mental effort

工作（人类活动）

someone or something that gives money, clothes, etc. to a charity for free

恩人

a wealthy person, often a celibrity, who donates money and puts time and effort in order to help make life better for other people

慈善家

involved in or related to helping people who are in need to improve their living conditions

人道主义的

a person who tries to bring about political or social change, especially someone who supports strong actions such as protests, etc.

社会变革的推动者