| A major stumbling block for many investors is dealing with the investments heading south. |
| United's possible bid for Inter defender Blanc could hit a stumbling block with the impending closure of the Serie A transfer window. |
| The biggest stumbling block for most people involves the few requisite Perl modules for database support. |
| Finance is the only stumbling block as the Australians are extremely keen on the idea. |
| The first stumbling block for most students is the specialized terminology of agrostology. |
| But figuring out exactly how to regenerate ammonia borane from the residuum left after hydrogen has been extracted remains a stumbling block. |
