Sentence examples similar to has proven exceptionally difficult from inspiring English sources

Although stem cells have been derived from the cloned embryos of animals such as mice, the generation of stem cells from cloned primate embryos has proved exceptionally difficult.

The BRC assesses that "finding sites where all affected are willing to support or at least accept a [permanent nuclear waste storage] facility has proved exceptionally difficult" [2].

But for Maimuna opting out has proved exceptionally difficult, and dangerous.

And such is the power parliament already wields, that the measures have proved exceptionally difficult to challenge, even with the HRA.

All this has proven exceptionally fertile ground for ethnic humor.

Nevertheless, in spite of these difficulties, Lewis' approach to bonding has proved exceptionally useful.

It has proved exceptionally nimble at responding imaginatively to current events.

Together they have proven exceptionally capable in extracting valuable information from 3D structural models, as demonstrated in Jmol.

Donziger's court-the-press strategy had proved exceptionally effective.

Far from bolstering the prime minister's authority, the rest have proved exceptionally mutinous.

The implants have proved exceptionally vulnerable to ruptures and leaks, allowing the inferior silicone to seep into the body.