单词knuckleball
na.: 【棒】指节球网络: 蝴蝶球;指关节球;弹指球
〔体〕不旋转球
复数:knuckleballs
Shifting an Internet friendship into the real world can be trickier than hitting a knuckleball.
将网络友谊搬到现实世界要比投蝴蝶球更加困难。