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玛丽:
I'd like to get a new metro card. Do you know where I should go? 
我想办张公交卡.你知道去哪儿办吗?
李:
You should get a student card. It's half the price of a normal one.
你可以直接办学生卡.刷卡半价.
玛丽:
Really? That's great. How can I get a student card?
是吗?那太好了.怎么申请啊?
李:
Take your student ID card and go to the metro card booth to get your student card.
拿着你的学生证直接去公交充值点办理就行.
玛丽:
Does the student card have an expiration date?
这个学生卡有期限吗?
李:
You can use it until you graduate.
你可以一直用到你毕业.