How to use "sufficient" in a sentence

For only when our arms are sufficient beyond doubt, can we be certain beyond doubt that they will never be employed.

Certainly, for the Las Vegas paper, it ought to be sufficient

A few evergreen shrubs were clustered near the house, but none was of sufficient size to conceal a man

Yet the weak illumination that the lamps provided was apparently sufficient for the security cameras to obtain clear images of the entire plateau, because cameras were attached to every lamppost, and not an inch of the area escaped their unblinking attention.

Tina had never heard Elliot speak in this tone of voice, and his furious expression was sufficient to chill even her