想在图书馆办借书卡该怎么说？

I would like to apply for library card.

I want to manage a borrower's card.

借书卡 [简明汉英词典]
borrower's card

就说“老板，办张卡，谢谢”
嘿嘿

你对老板说：“老板，办一张借书卡，可以吗？谢谢！”就行了。
嘿嘿