https://online2.tingclass.net/lesson/shi0529/0009/9907/166.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
be asleep at the switch 失職
switch 開關(guān)，岔道
The new man was asleep at the switch and the two trains crashed.
新來的人疏忽職守沒有扳道而使兩列火車相撞了。
He got fired for falling asleep at the switch.
他因為失職被開除了。
瘋狂練習吧!
