他今天早晨在家里遭到身份不明的闯入者枪击。

He was shot this morning by unidentified intruders at his house.

《柯林斯英汉双解大词典》

地方探员托德·帕克说，这种方法帮他获得了一名身份不明的妇女的信息，该妇女的骸骨在大盐湖附近被发现。

Todd Park, a local detective, said the method has helped him learn more about an unidentified woman whose skeleton was found near Great Salt Lake.

youdao

第三枪是画面之外响起的，来自一位身份不明的枪手。

The third came from offscreen fired by an unidentified shooter.

youdao

There's never been any agreement, so far as I can tell, as to who it is we're supposed to be imagining the outside observer to be, and there are all sorts of conjectures.

这里的X到底是谁，就我所知，并没有定论,这个置身于外的观察者的身份仍然不明，关于这点又充满了各种各样的推测。

耶鲁公开课 - 弥尔顿课程节选