disappeared without a trace

常见例句

Once the shadow of a small sheep had disappeared without a trace.
昔日小绵羊的影子就已消失得无影无踪。
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.
除了极少的神话传说留给后人一点虚无缥缈的印象以外，一切似乎均在不知不觉中消失得无影无踪。
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.
相关人员表示说， “拍照的市民在按下照相机的快门后，不明飞行物体便消失的无影无踪。因此可以判定该物体不是昆虫或鸟类，也不会是气球。”

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