It's not always easy to tell which way the water is circulating down there.

Some of these exist in the ocean, if the water doesn't circulate enough.

I want the lights on and the water circulating here.

The water circulates between the two lakes, especially during the winter.

Because of heat from the nuclear material, the water circulates constantly.

Since there is no effective way to keep the water circulating, the pipes are likely to freeze up.

Another path in which the water can circulate is by flowing directly to the ocean.

Water circulates over that part of the disk, cooling it.

The water for this system circulates quite separately from that in the body cavity.

Their production is augmented by water circulating through the melting ice.