重点讲解：
1. live off
依赖……生活；
eg. I don't know how she manages to live off her painting.
我不知道她怎么能以画画为生。
eg. The whole population of the village live off tourism.
全村的人都以旅游业为生。
2. hear from
听说；从…听到；
eg. What are you hearing from people there?
你在那里都听到人们说了些什么？
When they did not hear from her, they feared the worst.
他们那时听不到她的消息，唯恐发生了最糟的事。
3. be famous for
因 ... 而闻名；
eg. Dunhuang is famous for its mural art.
敦煌以它的壁画艺术而闻名。
eg. He is famous for the excellence of his fine arts.
他以优秀的美术作品而闻名。
