The man's identity remains unknown.

这名男子的身份还是个谜。

《牛津词典》

Mikoshi-nyudo's true identity is unknown, but in some areas, he is believed to be a shape-shifting weasel, fox or tanuki.

见越入道的真实身份仍是未知，但有些地区的人们相信他是由黄鼠狼，狐貍或貍变的。

youdao

But the identity of that lineage, and the characteristics of early Homo, are unknown.

但是这个南方古猿谱系的特性，以及早期人属的特征都是未知的。

youdao

The young woman's identity was unknown until Caryville police received an anonymous tip on Monday, having released a picture and requested information from the public.

CNN: STORY HIGHLIGHTS

On Monday, the United States Justice Department asked the Miami Federal Court to enable the Internal Revenue Service to serve a "John Doe" summons to UBS. This would allow it to obtain information about possible tax fraud by people whose identity is unknown.

FORBES: Magazine Article

Although he has since been identified as 60-year-old Larry Bailey, his identity was then unknown.

MSN: 'He started tearing up. I started tearing up.'