How to Use "indispensable" with Example Sentences

1. Only saudi arabia 's output will be indispensable .
2. Cars have become an indispensable part of our lives .
3. Obama is indispensable to the new doctrine .
4. The more intimate the relationship , the more indispensable it becomes .
5. Since then , it has become an expedient but far from indispensable tactic .