0 (especially of a problem or a difficulty) so great that it cannot be dealt with successfully -- （尤指问题或困难）难以克服的，不可逾越的
The resulting problem seemed stark, if not insurmountable: while subjugation compromised attempts at assimilation, assimilation would falter in the absence of the necessary transformation.
Powerful veto players such as the executive, congress and the military could present insurmountable obstacles.
The subjectivity barrier is often cited as an insurmountable obstacle to meaningful phenomenological examination of brain states.
They chip away at societal images of old people, which seem to others to be an insurmountable obstacle.
For such couples, it is harder to stop unsuccessful fertility treatment than it is to keep trying in the face of almost insurmountable odds (13).
Experience has shown that very few patterns produce insurmountable impediments for the arterial switch procedure.
However, this was not seen as insurmountable but rather as an area for further development.
It remains to be seen whether the differences are insurmountable or whether this will become a major approach to research in language learning.
