"Unfreeze a bank card" is the proper Engpsh terminology for "银行卡解冻."

It refers to the process of removing a restriction or block from a bank card so that it can be used again for transactions.

Examples of usage in Engpsh:

"I need to request for my bank card to be unfrozen."
"Can you help me unfreeze my bank card so I can use it for purchases?"
"The bank has unfrozen my card after I resolved the issue with my account."

Example translations in Chinese:

"我需要请求解冻我的银行卡。"
"你能帮我解冻我的银行卡以便进行购买吗？"
"在我解决了我的账户问题后，银行已经解冻了我的卡。"