knuckleball是什么意思音标:英 ['nʌklbɔ:l]美 ['nʌkəl'bɔ:l]

n. [棒](投手投出的)不旋转球

n. a baseball pitch thrown with pttle speed or spin

knuckleball的用法和例句：

1.Well, I hadn't seen his knuckleball when I said that.

我当时还没有看到他的投球技术