flutter kick

英 美
  • v.浅打水(膝部保持不动仅用小腿上下击水游泳法)
  • flutter n.摆动;振翼;烦扰vi.摆动;振翼;烦扰vt.使心烦;使焦虑
  • kick v.踢;反冲n.踢;反冲;后座力
Noun:
  1. a swimming kick; the legs are moved rapidly up and down without bending the knees