without a trace

基本解释

Time always flies away like water and all the things will gradually be gone and slowly disappear some day, without a trace. So how about you?
时间总是像流水一样划过我们的指尖，不留下一点痕迹，那么你是不是也会被带走呢？
If you want new insights into yourself, you harness the power of countless observations of small incidents of change—incidents that used to vanish without a trace.
如果你想洞察自身，你可以在数不清的小事故——通常无影无踪的小事故——的变化中观测数据。
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。”

He also produces the police drama about missing people called Without a Trace. And the Emmy award-winning reality TV show, The Amazing Race. Jerry Bruckheimer has won many awards during his career, including several Emmys,Oscars, Grammys and Golden Globes.
She called on Eritrea to clarify the whereabouts of 11 MPs who disappeared without a trace in September,2001.

In the heart of the French countryside, a young boy disappears without a trace.
NEWYORKER: Olivier Olivier
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