Hold a snail with the tip of its shell pointing upwards and the opening towards you, and the shell will normally coil away to the right. Less commonly, it will coil to the left.
如果将蜗牛的壳尖朝上而让它的口对着自己这样放着，它的壳往往会向着右边旋去，一般情况下很少会向左转。
2
It also gets the left shoulder turning so the upper body starts to coil against a stable lower body.
这样还可以更有利左侧肩膀的转动，身体上部开始紧靠着稳定的身体下盘扭转。
3
The left photo above shows the rewound work coil 7 1/2 turns with much less dead space in the centre .