spiral star ball 螺旋球 ; 立体的也可以螺旋星球 ; 螺旋星球
A microphone is used to magnify the voice. It reflects the extent of the power of the voice through the brightness of the glowing spiral ball.
通过螺旋形排列的辉光球点亮多少反映声音功率的大小。
Dr Toyabe likens the system to a ball on a spiral staircase.
Toyabe博士把这个系统比作在螺旋梯上的皮球。
A small ball is making circular motion at the uniform velocity, the centripetal force has suddenly increased, it is proved that the small ball will generally make a spiral motion.
详细讨论了当向心力突然增大后，原来作匀速圆周运动的小球其运动轨迹的变化情况，证明了小球将作螺线运动。
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