vortex ring

短语

n. 涡环

词形变化

vortex rings 复数 vortex rings

释义与例句

n.
  1. 1.

    A toroidal vortex in a fluid or gas, i.e. a region where the fluid mostly spins around an imaginary axis line that forms a closed loop.

    Vortex rings are rarely noticed unless the motion is revealed by suspended particles, as in smoke rings.