pitchn.球场；程度；音调；推销；投掷；街头商贩摊位；沥青；树脂；松脂v.投；颠簸；搭帐篷；定调；推销；用沥青覆盖pitch uponadj.选定(决定)pitch gage螺距规pitch disc节径盘pitchwheeln.相互啮合的齿轮pitchblackadj.漆黑的pitch lock桨距锁pitch edge叼口边pitchinginn.吃刀(切口；空刀距离)pitch face斜凿面pitch time节拍时间

pitch outvi.投出；扔出