fastballsCOCA⁴⁵⁸⁴²BNC²³⁶²¹³⁺¹ 基本例句 n.棒投手投出的快球原型fastball的复数 If you're really into it and you're at MIT, maybe you want to know the wavelength of these average fastballs. So, let's go ahead and look at that. 如果你真的深入到这个问题中去,而且你在麻省理工学院，也许你会想知道这些快球的波长,所以我们继续来看这个问题。 v.163.com