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.
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
英英释意
1. a baseball pitch thrown with little speed or spin
