Sentence examples for been difficult to develop from inspiring English sources

So far, however, RNA-related drugs have been difficult to develop.

It would have been difficult to develop stories like Watergate without anonymous sources.

The use of algae and cyanobacteria as sources for biodiesel holds promise but has been difficult to develop economically.

Because of high polymorphism and multiple genes per haplotype, it has been difficult to develop a rapid typing method for cynomolgus monkey MHC class II.

Due to high polymorphism and multiple genes per haplotype, it has been difficult to develop a rapid typing method for rhesus monkey MHC class I.

Because in Anglo-American practice abitrators generally do not have to provide any reason to accompany an award, it has been difficult to develop guidelines for the conduct of business relations.

Meanwhile the message coming back from developers was that the system's architecture was difficult to develop for and came with inadequate tools.

It's difficult to develop our game.

Other executives say it is difficult to develop a good rapport with people when their interaction is only intermittent.

I think it's difficult to develop consistency if you don't play in the majority of the games".

Therefore, it is difficult to develop and implement information systems to support projects.