Even close siblings can vary greatly in the time taken to achieve each key milestone.

It also provides a timetable of key milestones the federal agencies must meet in carrying out the program.

The following are key milestones in Sykes' official history as a company.

The key milestones in the history of the line are:

This is also a key milestone in the development of moving pictures.

Western Europe's poorest, least developed country reached a key democratic milestone.

Learn about the key milestones, from walking to talking.

Tatras were key milestones toward the automobile as we know it today.

I distinguish four key milestones for the coming months.

For example, fueling the shuttle requires several teams working at key milestones.