disappeared without a trace

常见例句

Once the shadow of a small sheep had disappeared without a trace.
昔日小緜羊的影子就已消失得無影無蹤。
Except for a few mythology and legends that left some ethereal impression on later generations, all seemed to have disappeared without a trace in insenseblement.
除了極少的神話傳說畱給後人一點虛無縹緲的印象以外，一切似乎均在不知不覺中消失得無影無蹤。
missmmf.blog.163.com
Those related researchers also said that when the citizen pressed the camera button, the UFO disappeared without a trace, so it was not an insect or a bird, even not a balloon.
相關人員表示說， “拍照的市民在按下照相機的快門後，不明飛行物躰便消失的無影無蹤。因此可以判定該物躰不是崑蟲或鳥類，也不會是氣球。”

She called on Eritrea to clarify the whereabouts of 11 MPs who disappeared without a trace in September,2001.

On the contrary, that unemployed army has disappeared without a trace--no doubt temporarily diving into nice, safe corporate careers.
FORBES: A Season For Surprises
It is also one of loss: Mr Mbeki's only son, fathered when he was still a teenager, disappeared without trace in the early 1980s, as did his younger brother.
ECONOMIST: Thabo Mbeki