他们的推理是以一系列未说明的假定为基础的。Their reasoning was based on a set of unstated assumptions.这是由某些未加说明的方法产生的.It is generated by some specified means.他把如何走到农场说明的相当清楚.His directions as to how to get to the farm were quite clear....

“说明的”的英语可以翻译为：demonstrative，explanatory，[计] declarative，exponent，expositive ...