1. An ambitious plan to map the human brain came into focus in 2013.

2. At Stanford, ambitious students started the nonprofit Solar Car Project in 1989.

3. One ambitious seller bought a watch for $399 and is selling it for $800.

4. That makes it an ambitious plan, not least in terms of volume.

5. This mission is ambitious and at the core of what our customers deeply care about.

6. Online lenders were particularly ambitious in trying to take on the banks from outside the system.

7. The most ambitious projects are still on the drawing board.

8. For now, other countries are pushing ahead with ambitious projects to meet their Paris commitments.

9. This is a young campus that is incredibly accomplished but still very ambitious, he said.

10. Google likes to call its most ambitious projects moon shots.

11. There are also ambitious strategies to build entire organs.

12. We are extremely ambitious for this new service.

13. The new Mini model is way more ambitious, however.

14. This ambitious goal raised novel safety challenges that needed to be addressed.

15. It is the clearest signal yet that the ambitious effort may be on life support.