1) Time and time again they have run up against unsurmountable problems of distributing and getting the drugs accepted.

2) What could have propelled those people to continue what they were doing in the face of such seemingly unsurmountable obstacles?

3) He sees some concrete barriers today for Web technologies such as access to on board features and performance but they are not unsurmountable.

4) From an economic perspective, China 's economic emergence is an unstoppable trend for there are no unsurmountable obstacles in existence.

5) You can find strengths in spirituality to overcome worry even for seemingly unsurmountable problems.

6) A reminder of how one person's efforts can make a difference against unsurmountable odds.