live by是什么意思？

live by的音标：live by的英式发音音标为：[liv bai]live by的美式发音音标为：[liv baɪ]...

The islanders live by fishing.那些岛民靠捕鱼为生.She is fitted to live by herself.她宜单独生活.Man does not live by bread alone.人不能单靠面包生存....