https://online2.tingclass.net/lesson/shi0529/0002/2107/sl20040825.mp3
https://image.tingclass.net/statics/js/2012
a couple of
兩個(gè)，幾個(gè)
A: I need a couple of stamps to mail these letters.
我要幾張郵票寄這些信。
B: I don't have any. Why don't you go to the post office?
我沒半張郵票。你不如去郵局吧？
