Sentence examples for proven difficult to achieve from inspiring English sources

In practice, the inclusion of women in security-related decision-making has proven difficult to achieve.

These new material manifest an exciting combination of key mechanical, as well as adaptive, properties that have until now proven difficult to achieve in man-made systems.

Targeted gene transduction of specific cells and tissues by lentiviral vectors has been a major goal, which has proven difficult to achieve.

Dengue experts believed that to stave off complications of a second infection, a vaccine must provide balanced protection against all four serotypes and that has proven difficult to achieve.

Whether they expand that majority could become critical for Trump's presidency since it has so far proven difficult to achieve consensus among the slim majority of 52 Republican senators.

For vertebrate striated muscle, modeling steady-state isometric tension data with the known properties of calcium binding has proven difficult to achieve.

Some analysts said the fourth-quarter sales target might prove difficult to achieve.

Analyst Robert Plant said: We think restructuring and recovery will prove difficult to achieve.

But that consensus has proved difficult to achieve, and all the financing is not yet in place.

This may prove difficult to achieve, given that there was a deficit of £11.4bn in March 2013," he said".

Alkaline side optimum pH of hydrolases is always desirable, and it is proved difficult to achieve that by mutation only.