| 单词 | knuckle ball | 
| 释义 | knuckle ball听听怎么读 
                            英 [?n?kl b?:l]
                         
                            美 [?n?k?l b?l]
                         是什么意思 慢速变化球; 英英释义knuckle ball
 学习怎么用 权威例句KnuckleballKnuckleballAerodynamics of a knuckleballUnsteady Aerodynamic Force on a Knuckleball in SoccerAerodynamics of KnuckleballUnsteady aerodynamic force on a knuckle ball in soccerAnalysis of knuckleball trajectoriesIndependent wear indicator assembly for vehicular steering knuckles ball & socket joints and other similar devicesFactors of unpredictable shots concerning new soccer ballsErratic Behaviour of Knuckleball : (1) Quasi-Steady Flutter Analysis and Experiment | 
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