Sentence examples for difficult task to obtain from inspiring English sources

It is a difficult task to obtain a closed form for ( E_{n}^{s} ).

It is a difficult task to obtain the dynamical solution in general.

However, in general, it is a difficult task to obtain the collection of the instrument constants which are essential to perform the process, for the old seismic recording systems since the necessary documents are not available.

Although the existence of the generalized solution for the nonlinear incompressible viscoelastic fluid system (1 - 3) has been provided in [1, 6], because the system not merely contains the pressure and the velocity vector but also includes the deformation tensor matrix, i.e., it includes seven unknown functions, it is a difficult task to obtain its analytical solution.

"Jackson had a very difficult task to accomplish," Mr. Foster said.

Forecasting water breakthrough is a difficult task to be performed for naturally fractured reservoirs.

"It's a difficult task to increase your audience.

But it is difficult task to attract and retain sponsors.

This would be a difficult task to achieve.

"There will be difficult tasks to come," Merkel acknowledged Friday.

Yet, this may be a daunting task because it is difficult to obtain older samples and some of the HPeV types e.g. HPeV2, HPeV4, HPeV5 and HPeV6 appear to be relatively rare (see e.g[ 17, 18]).