为什么银行卡不能转账？这个问题的答案涉及到多个方面，下面我们来一一解析。

首先，银行卡不能转账可能是由于账户信息错误。如果账户信息不正确，例如账号、姓名或银行名称等，那么将无法进行转账操作。为了避免这种情况，请确保账户信息正确无误。英文翻译为: Why can't bank cards be transferred? This question involves many aspects, let's analyze them one by one.

Firstly, the inability to transfer bank cards may be due to incorrect account information. If the account information is incorrect, such as account number, name, or bank name, the transfer operation cannot be performed. To avoid this situation, please ensure that the account information is correct.

其次，银行卡不能转账可能是由于账户余额不足。如果账户余额不足以进行转账操作，那么将无法完成转账。请确保账户余额充足，以便进行转账。英文翻译为: Secondly, the inability to transfer bank cards may be due to insufficient account balance. If the account balance is insufficient for the transfer operation, it cannot be completed. Please ensure that the account balance is sufficient for transfer.

再次，银行卡不能转账可能是由于未开通转账功能。如果账户未开通转账功能，那么将无法进行转账操作。请联系银行开通转账功能。英文翻译为: Once again, the inability to transfer bank cards may be due to the lack of transfer function activation. If the account has not activated the transfer function, the transfer operation cannot be performed. Please contact the bank to activate the transfer function.