pitching

• The pitch depends on the frequency .
  音调的高低是由频率决定的。
• People just pitch their rubbish over the wall ..
  人们直接把垃圾扔过墙去。
• They pitched a yarn about finding the jewels .
  他们编了一个找到宝石的故事。
• Men and women , old and young , all pitched into the work .
  男女老少齐上阵。
• The police dragged the football fans off the pitch .
  警察把足球迷拖出了球场。
• They pitched into the work immediately .
  他们立刻干了起来。
• Let us pitch out the troublemakers .
  把这些捣乱分子赶出去。
• The guard pitched backward without a sound .
  警卫一声不吭，仰面朝天倒在地上。
• Rain had made the pitch rather dead .
  场地因雨而阻力增大。