riot stairs

短语

词形变化

only 复数

释义与例句

n.
  1. 1.

    A flight of stairs that is constructed to deliberately disrupt the natural strides of people walking or running on them.

    仅复数

词源

Coined for the construction of such stairways on university campuses in response to student unrest during the 1960s and 1970s in an effort to prevent mobs of students from running together.

来源：wiktionary