flat-foot spin 平刃旋转
flat foot spin 单脚平转 ; 单脚平刃旋转
one-foot upright spin 单脚直立旋转
one foot spin 单脚旋转
cross foot spin 交叉旋转
change foot spin 换脚旋转
double flat foot spin 双脚平刃旋转
change foot sit spin 蹲转换足
change foot camel spin 燕式转换足
When it's spinning parallel to the ground, support your weight on your left foot and use your right foot to power your spin; the momentum of the hoop should carry you around.
首先从前位站姿开始；让呼啦圈逆时针转起来，当旋转和地面平行的时候，把重心放到左脚上，用你的右脚来给力；呼啦圈的动力会带动你晃动。
This study showed that an increase in the coefficient of friction between the ball and the foot caused the ball to acquire more spin.
这项研究表明，脚和球之间的摩擦系数的增加导致了球获得更多的角动能。
Their goal was less to drive foot traffic to Wabash avenue-which runs parallel to the more popular north-south thoroughfares of State Street and Michigan avenue-than to put a fresh spin on public art.
他们的目标是步行到沃巴什大道—南大道北州街与密歇根大道，而不是在公共艺术的一个新的周旋。
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