Sentence examples for were difficult to trace from inspiring English sources

Mr. Andrews noted that computer attacks were difficult to trace and could be damaging, which he said met Iraq's goals.

That opinion stated that such payments were "difficult to trace" and tended to lock in the purchasers.

On Tuesday, a spokesman for China's Ministry of Foreign Affairs, Hong Lei, made similar remarks, arguing that cyberattacks were difficult to trace because they were "often carried out internationally and are typically done so anonymously".

Their intention was to purchase guns which were difficult to trace.

Acquiring contact details from airlines was time consuming, and contact details on passenger lists were often minimal, so that contacts were difficult to trace.

The period of DiI transport required to fully label axons in L4 resulted in dense labeling in L6 such that individual axons were 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.