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•  Details/ Many issues ... remain unresolved.
 The function of these signals ... has not yet been established.
 The precise basic defect ... has eluded investigators.
 The mechanisms involved in P ... are complex and still poorly understood.
 Many present conceptions of P ... appear unable to meet these criteria.
 The more specialized studies of these phenomena ... are very nearly lacking.
 The economic analysis in these cases ... is often conflicting.
 The analysis ...leaves many questions open/ fails to convey P's true
dimensions.
 A previous analysis of P ... failed to find a correlation between P and Q.
 The contradiction arose ... when connecting these findings to heart disease.
 The animal models available for use in AIDS research ... have certain
limitations.
 This method has its limits. Even complex models may not simulate P accurately.
 No mechanism ... has been put forward to account for the phenomenon.
 This validation ... constitutes only a necessary, but not a sufficient, test of P.
 These challenges ... are significant (enough)/ deserve closer examination.
 A barrier to resolving the problem ... may lie in Р/ can be the differences in P.
 This factor ... impedes/ obstructs the classification.
 Imperfect information ... complicates (compounds) the problem
 A potential application/ role/ value of P ... is still uncertain
 The cause of this metamorphic event ... is uncertain.
 But we should end on an optimistic note.
1.5.3. Research context: Inferences, suggestions, predictions

•  Serious attention should be paid to the environment/ context/ prospect of P.
 P ... should be identified in a developmental context/ is part of a broader
problem.
... is an environmental issue/ an issue to be reckoned with in such contexts.
... is of substantial significance for Q/ exercises a decisive influence on these
theories.
... has become a worldwide problem/ a hot topic in scholarly debates.
... can provide an exhaustive explanation of the phenomenon/ provokes reflection.
... provides relatively firm ground for examining RI may be very fruitful in the long
run.
... possesses this quality to a high degree/ advances our understanding of Q.
... can help to develop rigorous procedures (techniques) for such measurements.
... must be better understood/ is a quite routine technique by now.
... is beset with technical difficulties/ is an aspect of metacognitive development.
... is a going (leading) term now/ a broadly influential tradition.
... is a mature (more developed) field (of physics)/ a professional (topical)
discipline.
•  There is an undeniable interest in studying P. It proves to be very fruitful to
study P.
 A demand for such information ... stimulates theoretical research into Q.
 At present, the topic of theoretical concentration ... is the study of P.

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