平穏 Peacefully
穏固的防滑地毯 Stable non-slip floor coverings
穏定期 Going Steady
如此可以使球较容易转换成较为前滚的运动型态，使球的尾端较为平顺，球在球道上的行进路线也会比较穏定而容易被掌控。
This allows the ball to begin its turn towards a more forward roll which will smooth out the reaction and make the ball become more predictable as it travels down the lane.
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