Sentence examples for be difficult to trace from inspiring English sources

No patients were known to have been sickened, although such cases would be difficult to trace.

It can be difficult to trace a swarm to its source.

Torrenting is a method of file sharing popular with illegal downloaders and pornography distributors, as the origins of the files are said to be difficult to trace.

Even if the library's main clock had hands, which of course in a place like this it sometimes does not, it would be difficult to trace the slow ebbing of time.

Because the climate is of a highly complex nature it seems to be difficult to trace causality from a specific source (or country) where GHGs are emitted, to a specific event at a place often far away from the source of the emissions.

But despite spills being "comparatively rare", he added that it would be difficult to trace the source.

Currently when a drone is captured it is difficult to trace back to an owner.

The Hanks genealogy is difficult to trace, but Nancy appears to have been of illegitimate birth.

It is difficult to trace an attack to a specific individual in cyberspace.

But many robocalls are now initiated overseas by companies that are difficult to trace, Ms. Mahoney said.

But it is difficult to trace authorship for the W.P.A. guides.