Sentence examples for been difficult to deliver from inspiring English sources

But in practice, it has been difficult to deliver the drugs into cells with sufficient potency and lack of toxicity.

The issue is that while drugs working through the RNAi mechanism can indeed shut off genes, it has been difficult to deliver such drugs to the cells where they are needed.

But hundreds of clinical trials have been conducted since 1990 and most have failed, in part because it has been difficult to deliver the genes and get them to work for a long time.

For years, it has been difficult to deliver the nutrient value of milk in communities in Africa and Asia that do not produce or have the resources to buy milk.

Until now, native advertising has been difficult to deliver programmatically.

Without the support of these experts this project would have been difficult to deliver.

Promises to cut immigration are difficult to deliver while Britain is a member of the EU.

It has to be constantly fresh and that is difficult to deliver," she says.

Monologues are difficult to deliver in today's theatre; most audiences prefer action to reflection.

With fewer staff, it will be difficult to deliver the same services.

Also, he said, it may be difficult to deliver the drugs into the muscle if the prisoner is morbidly obese.