Economically, the Bronx shows signs of resurgence from a deep trough.

In the silence of the deep troughs he could think better.

The Beast slipped into the water of the swamp, slithering along a trough six feet deep.

A very small rise in the rater level, followed by a deeper trough.

Snow flurries are actually common during the winter months when there is an especially deep trough in the jet stream.

It is a natural rock formation in the stream that forms a deep trough.

There was a deep, ditch-like trough in the center of the small cave floor.

During the night, the Tabberer lost steerageway and could not fight her way out of the deep troughs.

It gave up on us and dove back into the deeper troughs.

They are cut by deep troughs 100-200 km across.