当事双方以外的人或团体third party

• 处于第三者的地位

  in the position of a third party

• 第三者不得干涉。

  Third parties should not interfere.

• 交给第三者

  give it to a third party

• 第三者的立场

  third party's point of view

• 第三者责任保险

  third party insurance

插足于他人家庭的人third person in an affair