knuckleball
                                                英 ['nʌklbɔ:l]
                    美 ['nʌklbɔ:l]
                
                                
                
                
                    
                                                                                                        knuckleball 英文词源
                
                
                    
                        - knuckleball (n.)
- also knuckle-ball, baseball pitch, by 1909, from knuckle (n.) + ball (n.1). So called from the position of the fingers in throwing it. Related: Knuckleballer.
 
                
                                                    knuckleball 双语例句
                
                
                    1. Shifting an Internet friendship into the real world trickier a knuckleball.  将网络友谊搬到现实世界要比投蝴蝶球更加困难. 来自互联网