one-time-only transaction怎么理解？

Q: When I place my order, it’s aone-time-only transaction (交易), right?
A: Yes. When you shop with us, you canshop with confidence and peace of mind. Every order placed with us is 100% safe andsecure. Our site is scanned and tested daily by McAfee SECURE. “The McAfee SECURE” trust mark (see the upper-left corner of our website) only appearswhen the website has passed their intensive, daily security scan.
本段中one-time-only transaction 怎么理解？

答案：直译为：一次性交易；因此你可以理解为The McAfee SECURE（一个著名杀毒软件）为了保障网上交易的安全，它会确保这次交易一次性顺利完成，不会因为网站的黑客，病毒，漏洞等让你被欺骗，让你再次进行交易，相当于让你在这一次交易中就可满意，亦可为“安全交易”。

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祝你学习进步生活愉快，满意的话记得采纳喔！

你好！ 一次性的交易 如有疑问，请追问。