But unresolved local issues and continuing differences with another union prevented an end to a 13-day strike.

They continue to date even though the difference in their respective social statuses prevents them from being together.

The difference of opinion over money, or equity, has prevented the two sides from reaching agreement on the proposed changes.

Typically these differences prevent the completion of the proof and need to be "moved away".

Nobody can walk away from the table and say that ideological differences prevent a resolution.

For some time, intra-regional differences prevented any progress at all.

Philosophical differences did not prevent the two men from being friends.

Political differences should not prevent scientific partnerships, he said.

Huge differences between markets and countries prevent the use of a 'one size fits all' approach.

Even within America, cultural differences prevent pop music from catching on.