那艘船消失得无影无踪。

The ship had vanished without (a) trace.

《牛津词典》

但是他似乎消失得无影无踪了。

But it seemed that he had disappeared into thin air.

youdao

有一天他离开了，消失得无影无踪。

One day he left, disappeared without a trace.

《柯林斯英汉双解大词典》

Then it will stay activated for some period of time, and eventually disappear again.

它在某一时间段保持激活状态,最后消失得无影无踪

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