我认为更明智的做法是不要卷入他们的个人纠纷。

I think it's wiser to ___stay ___out ___of their personal disputes.

既然你了解得不够全面，我建议你不要插手这件事。

Since you're not fully informed, I suggest you ___stay ___out ___of this matter.

外交官常常必须避免介入国内的政治争议。

Diplomats often have to ___stay ___out ___of domestic political controversies.