安全购物的英文表达是 "safe shopping"。

为了安全购物，你可以采取以下措施：

使用加密的网站购物。加密的网站可以使你的个人信息和信用卡信息不易被窃取。你可以通过看网站地址栏中的"https"前缀来判断一个网站是否加密。

例句：

It's important to shop on encrypted websites to keep your personal and credit card information safe.
Always look for the "https" prefix in the address bar to make sure the website is encrypted.
使用支付平台支付。通过使用支付平台，你可以更方便地跟踪你的购物历史，并且你的信用卡信息不会直接留在商家的网站上。

例句：

I always use a payment platform to pay for my onpne purchases. That way, I can track my shopping history more easily and my credit card information isn't stored on the merchant's website.
Paying with a payment platform is a safer way to shop onpne because it keeps your credit card information private.
使用独立的信用卡购物。为了防止你的个人财产被盗，你可以使用一张独立的信用卡进行购物，而不是使用你的主要信用卡。

例句：

To protect my personal assets, I always use a separate credit card for onpne shopping instead of my primary credit card.
It's a good idea to use a separate credit card for onpne purchases to safeguard your financial assets.