| 1. | The trough is the lowest level of the cycle .
谷底是整个周期的最低点。 |
| 2. | Folds commonly show a pairing of crests and troughs .
褶皱通常显示出成对的脊与糟。 |
| 3. | 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。 |
| 4. | Such a trough is called flume .
这样的木槽叫水槽。 |
| 5. | 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。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | 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。 |
| 9. | 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。 |
| 10. | 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。 |
