https://online2.tingclass.net/lesson/shi0529/0009/9907/577.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
top dog 勝利者，最棒的人，處于領(lǐng)導(dǎo)地位的人
My boss is the top dog at my office.
我老板是我們辦公室里最牛的人。
Mike is young, but he is a top dog in his company.
麥克雖然年輕，在公司卻位居要職。
