Goose step 正步
（重定向自Goosestep）
The goose step is a special marching step performed on formal military parades and other ceremonies. While marching in parade formation, troops swing their legs in unison off the ground, while keeping each leg straight and unbent.
Originating in Prussian military drill in the mid-18th century, the step was called the Stechschritt (literally, "piercing step") or Stechmarsch. German and Soviet military advisors spread the tradition throughout the world in the 19th and 20th centuries. The goose step is now used by the militaries of over seventy countries, comprising three-fifths of the world's population.