重启Steam程序两次来启用令牌保护功能。 点击设置或偏好设置菜单中的“启用Steam令牌”按钮。 确认打开Steam令牌。 没找到“启用Steam令牌”按钮。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
After verifying your email address, Steam Guard will turn itself on automatically if you restart Steam twice. This is a security precaution. This is the way to enable Steam Guard if you've just verified your email address or if you have disabled Steam Guard in the past. In the "Account" tab of your Settings or Preferences menu, "Security Status" will display "Protected by Steam Guard" if Steam Guard has been enabled. Note: After enabling Steam Guard, you will need to wait 15 days before you can