trough

• The trough is the lowest level of the cycle .
  谷底是整个周期的最低点。
• Folds commonly show a pairing of crests and troughs .
  褶皱通常显示出成对的脊与糟。
• So she quickly emptied her jar into the trough .
  她迅速地把水罐里的水统统倒进水槽。
• Such a trough is called flume .
  这样的木槽叫水槽。
• A deep trough divides the two parts of the antarctic .
  一道很深的海沟把南极洲一分为二。
• I have to keep the boat out of the trough of the waves .
  我得不让船落进波浪间的凹处去。
• Some of the bars and troughs are exposed by low tide .
  一些砂洲和沟槽在低潮位时，露出于水面。
• The rocks were folded by collapsing into the center of the trough .
  岩石由于坍陷进入凹槽的中心而发生褶皱。
• Where a trough and crest coincide we get the total amplitude zero .
  在波峰与波谷重合之处，总振幅实际上为零。
• The best method to date is to let the waste fibre fall into a trough .
  到目前，最好的办法是让废丝落在一个槽中。