spiral motion的用法和樣例：
例句
- A spiral motion of fluid within a limited area, especially a whirling mass of water or air that sucks everything near it toward its center.
漩渦在一定地域內液體的螺旋狀運動(dòng)，尤指把附近各種東西吸向其中心的螺旋水流或空氣 - A circular or spiral motion, especially a circular ocean current.
游渦一種圓形或螺旋形的運動(dòng)，特別是做圓環(huán)運動(dòng)的海水水流
