pitchyadj.沥青的；涂沥青的；沥青似的；漆黑的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 streak树脂条纹pitch sensor俯仰传感器pitch coking沥青焦化pitch a tent搭账篷pitch binder沥青粘结剂pitch tester节距检验器pitch period齿节周期pitching arm投球臂pitch stress高低音的重音pitching-in切入