Sentence examples for it has also been difficult from inspiring English sources

Up until now it has also been difficult to measure.

It has also been difficult to reconcile with other principles, especially those advocating equal retribution.

It has also been difficult to penetrate, they said, because many members are tied by blood and marriage.

"For instance, the fuel cell [used to create electricity with hydrogen] is a brand new technology". It has also been difficult to control the intensity of the light.

But it has also been difficult to find solid young choreographers, she said, because the AIDS plague wiped out so many of the artists who would have been their mentors.

It has also been difficult to sew up the rights to an entire disaster, making the movie a hodgepodge of stories--the children trapped in the elevator, the maintenance worker turned rescuer, and the woman in the wheelchair.

The kind of work described in the Nature study has also been difficult because it requires a scarce resource: eggs from young, fertile, healthy women.

The tumor has also been difficult to study.

Finding countries willing to prosecute the pirates has also been difficult.

His level of enthusiasm for running has also been difficult to assess.

Cooperation among the exchanges has also been difficult because of their fierce competition.