vortex ring

名词 n.
中文释义

英文释义

名词 n.
  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.

词形变化

vortex rings plural
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