https://online2.tingclass.net/lesson/shi0529/0009/9907/525.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
bread and butter 面包和黃油，基本生活來源，主要收入來源
I don't like my job, but now it's my bread and butter.
我不喜歡我的工作，但它能讓我過日子。
Oversea visitors are our bread and butter.
海外游客是我們的主要經(jīng)濟(jì)收入來源。
