Sentence examples for proved difficult to overcome from inspiring English sources

There's a potentially lucrative market for those that succeed, but the limitations imposed by the chemistry of batteries have proved difficult to overcome.

While the difficult terrain and civil instability have certainly been factors in the problems of eradicating polio in Pakistan, the belief that vaccinations are part of a western conspiracy has also proved difficult to overcome.

Sharing goods and ideas across national boundaries still makes economic sense, many said, but it has run into moral and political roadblocks that may prove difficult to overcome.

It quickly became their favoured plan B once it was clear that opposition to the port plan from the Royal Caribbean cruise line and a maritime workers' alliance would prove difficult to overcome.

But limitations to the procedure as it was originally proposed have proven difficult to overcome for forensic samples.

While we had significant victories in the federal district courts in New York and Boston and the Second Circuit Court of Appeals, the reversal of the Second Circuit decision in June by the U.S. Supreme Court has proven difficult to overcome.

But Indonesia's systemic problems will prove difficult to overcome, especially for an outsider with no background in the security forces.

Several people experienced in the delivery of humanitarian aid in strife-ridden third-world countries told The Huffington Post that the conditions levied by USAID may prove difficult to overcome, particularly the prohibition on paying any bribes or taxes.

Flaming, floating gasoline proved difficult to subdue.

War Pass [who was injured and withdrew] was a great champion and a great two year-old, who proved difficult to train, and he proved that he couldn't really overcome adversity.

Neutrality proved difficult to maintain, though.