There are other programmes, however, that are known from evaluations and other assessments to be of high quality and great value, but for which the formulation of a succinct and convincing description of results is much more difficult.
不过，另一些方案可以从评价和其他评估中了解到其质量好价值高，但这些方案却远较难以简明而具有说明力地介绍其成果。