In announcing the deal yesterday, Delta's chief executive, Gerald Grinstein, warned that difficulties remained.
"The state is confident that difficulties experienced in the past will not recur.
He noted that difficulties in modeling were widely acknowledged and disclosed in the literature.
The results implied that difficulties will arise in designing policies as business credit expands.
The paper argues that difficulties with reform reflect the highly political nature of the undertaking.
However, it must be emphasised that difficulties in the identification of this species have undoubtedly led to it being unrecorded.
Barclays warned, however, that difficulties in Europe and uncertainty in global markets could weigh on future profitability.
Nevertheless, pharmaceutical companies realize that difficulties getting patients screened and treated could limit the use of their drugs.
I had found in my previous teaching experiences that difficulties with the subject matter were often concentrated in similar areas for many students.
Western officials who are observing the elections predicted that difficulties might arise from logistical problems and some corruption, though not extensive fraud.
President Hu Jintao warned at a government meeting last weekend that difficulties in the global economy threatened to undermine growth in China.
