n.[C]

1. 饲料槽；饮水槽
2. 揉面槽；洗矿槽
3. 檐槽，天沟
4. 波谷
5. 【气】低压槽
6. 低谷；低谷期，萧条阶段
   The business cycle is a series of peaks and troughs.

   商业周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.