The question is whether he is alive or dead. There is no trace of him.

问题是是他是生还是死我们无从得知他的行踪。

youdao

Then again, the point of the report was never to create a comprehensive history of the Congo wars. It was to give a voiceto the dead who have otherwise dissolved without trace in the steaming jungle.

再者，这篇报告的宗旨并不是为了展示刚果战争史的全景，只是要为那些在热带丛林中已无踪迹可循的死者说一句公道话。

youdao

One of my friends said he chased me all the way into a dead-end alley, and that I would just disappear without a trace.

我一个朋友说他一路追我进了一个死胡同，可是我就无影无踪地消失了。

youdao

As so often, DNA tests on the deer carcasses in Gloucestershire revealed another dead end: the only trace found on the carcasses was that of a fox, which most likely scavenged the creatures after death.

BBC: Isle of the tiger

Repeated appeals failed to trace her and she was pronounced officially dead at the Court of Session in 1992.

BBC: The biggest cases of Scotland's smallest police force