— though this is currently difficult to prove because poor countries like Bolivia have little long-term scientific data.
She said that it is currently difficult for the police to enforce rules on dog mess, unless police are "in the right place at the right time".
"I believe that it is currently difficult to be among the top five in the world in any of the distance events without using EPO or human growth hormone.
Furthermore, it is currently difficult to distinguish true variants from sequencing errors.
However, this is currently difficult to achieve as explored in this paper.
It is currently difficult to predict the structures and bioavailability of CPs.
Thus, it is currently difficult to make an informed choice between protocol flexibility and statistical efficiency.
It is currently difficult to find this content, as there isn't a guide.
Although it is currently difficult to identify the exact source of Pb contamination, several possible sources exist.
It is currently difficult for a potential user to determine the accuracy of application content prior to purchase.
However, while such policies are lacking, it is currently difficult to verify the accuracy of the published data.
