Ground stress is the ultimate force source which affects all the ground project stability and one of the main subjects that the engineering geology long-time studies.

地应力是影响一切地下工程稳定性的根本力源，是工程地质学科长期研究的主要课题之一。

youdao

After thousands of years of political experimentation, it seems pretty clear that some institution is always going to have a monopoly of force, and some human being or group of human beings is going to have the ultimate authority over how that force is used.

FORBES: The Case Against The Case Against Voting

The ultimate size of the force will depend upon the willingness of U.N. members to contribute troops, police and equipment, with most of the force coming from Africa.

NPR: U.N., African Union Unite to End Darfur Violence