She had vanished without a trace.

她消失得无影无踪。

youdao

Youth is a brief dream, when you wake up, it had vanished without a trace.

⊙、青春时代是一个短暂的美梦，当你醒来时，它早已消逝得无影无踪。

youdao

But within hours, the comment, as well as dozens of similar ones, vanished without a trace.

但是数小时之内，评论，以及数十名相同的，就消失得无影无踪了。

youdao

However, Barbara Knight told the Plain Dealer newspaper she never believed she would have vanished without a trace of her own accord.

BBC: US & Canada