Sentence examples for remain difficult to achieve from inspiring English sources

Although numerous international environmental treaties have been concluded, effective agreements remain difficult to achieve for a variety of reasons.

The revelation of a second enrichment plant in Iran will change some of the tactics of the six-nation group – the US, Russia, Germany, France, China and Britain – but their strategic goals remain difficult to achieve.

The paper argues that without addressing transport taboos, such as highly unequal individual contributions to transport volumes and emissions, social inequality of planned market-based measures, the role of lobbyism, and the various social and psychological functions of mobility, it will remain difficult to achieve significant emission reductions in passenger transport.

More patients are on now treatment and for the majority of patients, the pill burden continues to rise, at significant cost to funders, while improved disease markers and outcomes remain difficult to achieve.

Unfortunately, such people, organizational, and leadership models remain difficult to achieve in many large AHCs and similar research organizations for a variety of reasons as introduced and elaborated upon in this report.

However, without greater clarity about what respite is intended to achieve, clear evidence of a positive impact of this intervention may remain difficult to identify.

Methane and ethane remain difficult to convert by this route.

Many variants remain difficult to classify by traditional genetic methods.

The mechanisms leading to sensory restoration remain difficult to explain.

Questions remain unanswered or factors remain difficult to measure.

Various empirical and semiempirical flow resistance models have been developed during the past century; however, a universal flow resistance model for varying types of rivers has remained difficult to be achieved to date.