https://online2.tingclass.net/lesson/shi0529/0009/9907/22.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
充話費(fèi)英文怎么說?
top up 充值
My phone is out of credit，I have to top up it .
我手機(jī)沒錢了，得去給手機(jī)充值。
I don’t have any money on my phone. I have to put 100 yuan on it.
我手機(jī)沒錢了，得去給手機(jī)充100元。
瘋狂練習(xí)吧!
