Sentence examples for been difficult to determine from inspiring English sources

"We have seen bids where it has been difficult to determine actual ownership.

It's always been difficult to determine the role of a producer, because they all work so differently.

The stability of distillation systems has always been difficult to determine due to the nonlinear natural of the unit operation.

Since Major League Baseball began testing for amphetamines in 2006, it has been difficult to determine the policy's value as a deterrent.

Because antibiotics are used to treat respiratory illnesses, which are often precursors of asthma, it has been difficult to determine the effect of antibiotics alone.

But just how much of the reefs, which exceed 200,000 square miles, is on the critical list has been difficult to determine.

Correcting for the effects of the CTF requires accurate knowledge of the CTF parameters, but these have often been difficult to determine.

The effects of global warming on individual storms have been difficult to determine, scientists say, because there are only about a dozen observed even in an active season.

The projected cost savings countrywide have been difficult to determine, given all the other economic factors in a $3 trillion, diversified economy.

It has been difficult to determine, though, which of those fatal expeditions were aimed at finding Bergdahl and which would have been undertaken anyway.

The specific protective properties of polymers have been difficult to determine due to the variation in the chemical nature of polymers often compared.