Sentence examples for often difficult to define from inspiring English sources

Distinctions between the four species of true cedar are often difficult to define.

For all their talk, the Sandlers are aware that results are often difficult to define, much less measure.

One is never quite sure where the artist stands in relation to her characters, and they in turn are often difficult to define.

It is often difficult to define or measure, as its members can be spread over kilometres of ocean but still be in contact with one another.

In many districts, teachers can now be investigated for vaguely worded charges like "moral turpitude" or "conduct unbecoming" that are often difficult to define and difficult to prosecute or defend against.

The strength of fuzzy logic lies in its capability of simulating the decision-making process of a human, a process that is often difficult to define with traditional mathematical methods.

Giersiepen and Spallek [ 70] point out that a clear delineation from a defined occupational disease is often difficult to determine when several conditions in the same body region are present.

Sampling approaches are often difficult to determine.

Physical access is often difficult to determine.

The border between them is very often very difficult to define.

Because this unit varies from a few metres to tens of metres, from clays to laterites, sandstones or limestones, and from conglomerates to breccias, it is often very difficult to define its precise position solely from the examination of cuttings.