Sentence examples for been difficult to detect from inspiring English sources

Wada director general, David Howman, said the test would be carried out alongside existing detection methods for the substance, which has been difficult to detect in the past because it occurs naturally in the body.

It has been difficult to detect a virus in mosquitoes during IEP in Tanzania despite detection of a virus antibody among livestock and wildlife populations (4).

There was no sign of injury yesterday although, as Harrington has something of the sailor's swagger in his walk, it would have been difficult to detect anyway.

Terrorism experts said he would have been difficult to detect, because he left the country as a French citizen and had a French passport.

As a result, it has often been difficult to detect national trends, or for residents to know what is flowing through their taps.

For years, EPO has been difficult to detect with standard urine and blood tests.

It was difficult to detect any sense of disappointment.

But Mr. Hillier's hand would be difficult to detect.

By its nature, publication bias is difficult to detect.

By its nature, corruption is covert; payoffs are designed to be difficult to detect.

But a small centrifuge plant would be difficult to detect.