It was developed in the 1970s and is a cornerstone of the international payments system, as it allows banks to communicate securely.

它开发于 1970 年代，是国际支付系统的基石，因为它允许银行进行安全通信。

And people who earn money from abroad, whether they, I don't know, do online courses or runs businesses that require international payments, they're unable at the moment to really process them.

从国外挣钱的人，比如说做在线课程或经营需要国际支付的业务，他们目前也没办法处理了。

Yes. So Visa and Mastercard's departure and Apple Pay and this kind of thing means that though credit card transactions within the country are still functioning on those systems, international payments are not.

是的，所以 Visa 和万事达卡和苹果支付的停用意味着虽然国内的信用卡交易仍在这些系统上运行，但国际支付却不能进行了。