额外球 meaning in Chinese

extra hole

For that , villone was willing to spend six weeks pitching in the minors , fine - tuning his stuff with regular work and doing away with the need to " manufacture , " or try to create additional velocity that may not have existed at that time , as torre noted repeatedly in spring training
为了能够上到大联盟，天天v愿意在小联盟投上六个星期，以规律的作息微调他的投球内容并且有所产值，或者是尝试创造当时所不可能存在的额外球速，这是老爹在春训的时候一在的提及的。