Sentence examples for is difficult to pin from inspiring English sources

The history of the crayon is difficult to pin down.

Murdoch's assertion that time spent on Facebook is falling is difficult to pin down.

An oft-aired concept, the inspirational speech is difficult to pin down.

But it is difficult to pin English Christianity down to any particular policy positions.

Whether they're coming in significantly higher numbers is difficult to pin down.

Part of the problem is that the Latino market is difficult to pin down.

Meanwhile, just what Rose contributes on the court is difficult to pin down.

Unfortunately, again, it is difficult to pin the temperature reduction on the Popigai and Chesapeake impacts.

As experts have noted, the exact reason for the spike in youth suicide is difficult to pin down.

Unfortunately its exact history is difficult to pin down, because although pastry was often used, detailed recipes didn't make it into cookery books until the mid-16th century.

The report indicated that the extent of the killing in Darfur, which ranges from 30,000 victims to many times more, is difficult to pin down.