Top up「pos手機儲值」
手機「儲值」，英文叫做「postop-up」。Top up本來的意思是把一個容器填滿，就是續杯的意思。現在這個詞又擴大了應用的範圍，比如給手機充值，或者給公共交通卡充值，等等。
To top up means to refill a container until it is full again. But in recent years to top up has come to mean putting more credit into a mobile phone account.
A: My mobile phone is out of credit.
B: Here, use mine. With calls billed on a post paid basis, (固定收費) you never have to worry about running low on value or have to top up your calling card.pos
A: Yeah, you bet. Do you know where I can top up my phone?
B: You can buy a top-up card in any convenient stores. Or you can top up your mobile phone on the internet – just go to the website and buy credit for your phone with your credit card.
除了top up，還可以用recharge。
Your calling credit is low. You may need to recharge your account.
