It has helped to boost usage with differential pricing: tickets boughtforcash cost a lot more than using a smart card.
现金购票比使用智能卡要贵得多，两者的差价促进了卡的使用。
2
We used to pay with cashfor everything we bought.
我们过去买什么都用现金支付。
3
With the cash from his mother, he bought a couple of plastic molding machines and started making channel-changing knobs for black-and-white televisions.