Sentence examples for contributors is difficult from inspiring English sources

Identifying and independently varying critical cellular and molecular disease contributors is difficult in animal models, but in microfluidic systems, molecular factors and different cell types can be varied independently and simultaneous measurements of real-time system-level responses become practical (Benam et al. 2015; van de Stolpe and den Toonder 2013).

Dennis Assanis, director of the Walter E. Lay Automotive Laboratory at the University of Michigan in Ann Arbor, says the H.C.C.I. combustion process offers potential for raising gasoline engine fuel efficiency by 15percentto20percentcent while offering reductions in oxides of nitrogen, an important contributor to smog that is difficult to control.

There is a complex multiplicity of risks of exposure and it is difficult to tease out the biggest contributors to infection.

Ammonia is difficult to measure but is an important contributor to the unhealthy haze over polluted cities such as Beijing.

"It is difficult for [social enterprises] to compete," said one contributor.

Many contributors shared their thoughts on why it was difficult to talk about and get support for mental health issues in the sector.

The roles of local selection, ongoing gene flow with drift, and dispersal limitation are difficult to tease apart as contributors to the observed population structuring of D. rosea.

Many factors have been identified as contributors to risk of alcohol abuse but their relative importance has been difficult to quantify.

Giving younger employees, customers, contributors and their beneficiaries a voice ensures a degree of authenticity that would be difficult to achieve through conventional top-down corporate communications.

It would be difficult to pick just one piece by blogger and network contributor Ermintrude.

At the same time, white dwarf stars, which are difficult to observe and of which very few are known, are among the more significant contributors.