Sentence examples for are difficult to trace from inspiring English sources

"There are layer upon layer of cyber-entities and some are difficult to trace".

Yet they fuse on the page with a power and blunt beauty whose mechanics are difficult to trace even when you look closely.

They said the group was believed to have developed a system of using Web-based e-mail, using addresses that change constantly and are difficult to trace.

The vehicle ban, which started yesterday, is on older cars with temporary black licence plates, which are often used by bombers because they are difficult to trace.

The investigation was complicated by the fact that the programmer apparently used one of the prepaid Internet accounts that are common here in which temporary user names and passwords are issued that are difficult to trace.

It should be mentioned that Mithra gave his name to a mystery religion, Mithraism, which was popular throughout the Roman Empire but whose Iranian origins are difficult to trace.

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

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

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

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

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