existing controller

基本解释

I can't really compare the controller to existing tech.
我真的很难将这控制器拿来跟现有的科技做比较。
Answer y when it asks if you want to override the existing controller. (You can also answer a for all to override everything without being prompted repeatedly.)
当询问是否覆盖现有控制器时，回答 y（也可以回答 a 表示全部，这将覆盖所有内容，这样就不会反复出现提示）。
On the Domain Controller Type page, select Additional domain controller for an existing domain
在 Domain Controller Type 页面上，选择 Additional domain controller for an existing domain