n.[C]

1. 飼料槽；飲水槽
2. 揉麵槽；洗礦槽
3. 簷槽，天溝
4. 波谷
5. 【氣】低壓槽
6. 低谷；低谷期，蕭條階段
   The business cycle is a series of peaks and troughs.

   商業週期是一系列的高峰期和低谷期。

n.

1. a long, narrow open container for animals to eat or drink out of.
   ▸a similar container, e.g. one for growing plants.
2. a channel used to convey a liquid.
   ▸a long hollow in the earth's surface.
3. an elongated region of low barometric pressure.
4. a hollow between two wave crests in the sea.
5. a region around the minimum on a curve of variation of a quantity.
   ▸a point of low activity or achievement.

v.