არსებითი სახელი
Universal
1a long, narrow open container for animals to eat or drink out of:a water trough a long, narrow open container used for a purpose such as growing plants.
2a channel used to convey a liquid. a long hollow in the earth’s surface:a vast glacial trough a hollow between two wave crests in the sea.
3an elongated region of low barometric pressure.
4a point of low activity or achievement:seasonal peaks and troughs in the demand for goods and services Mathematics a region around the minimum on a curve of variation of a quantity.