This is not a fire drill—it's for real.
⇑ Translate the sentence above by Google ⇑
Related: drill
Prev: The laser, with its beam of strong light, can drill a hole in a diamond, and yet can be so well controlled that it can be used in delicate eye operations.
Next: Single-Leg Kick has been a favorite drill of some of the world's greatest breaststrokers.