You swing the heavy bat, you throw the heavy ball, then go down to a lighter load, lighter bat, lighter ball, and then to a real baseball or your real bat, and it feels like a lightsaber, you can swing it a lot faster.
你揮動沉重的球棒,投擲沉重的球,然後換成輕一點的負荷、輕一點的球棒、輕一點的球,再換成真正的棒球或你真正的球棒,感覺就像一把光劍,你可以揮得更快。