I also find it difficult to interact with girls without feeling like they are judging me.
He found it difficult to interact with other people and displayed aloofness.
They are, however, very difficult to study because they interact so weakly with normal matter.
The neutrino, one of the most common fundamental particles, was very difficult to study because it interacts only very weakly with other particles.
Haroche and Wineland have been able to do experiments which involve manipulating individual particles while maintaining their quantum nature; this is very difficult to achieve because particles tend to interact with the environment and then behave in a classical (non-quantum) manner.
And because culture conditions every aspect of our lives, it is very difficult to remain aware of its invisible impact when interacting with people who have not been culturally conditioned the way we have.
The list of genes that are known not to interact is small and by far incomplete, so it is very difficult to evaluate the sensitivity of our predictions.
It is very difficult to interpret the present findings without knowing whether the older adults and children had regular opportunities to interact with each other.
From a methodological point of view, it is very difficult to distinguish sharp boundaries of infrastructure systems, in which technical and social elements are included and interact in a complex manner.
