| 1. | The fort has a system to circulate water around it for safety.
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| 2. | The concretions grew larger as the circulating waters deposited more layers.
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| 3. | The facility operates one of the largest circulating water tunnel in the world.
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| 4. | A system of pipes and canals circulates water through the ponds.
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| 5. | Older tanks used the power of the athlete to circulate water.
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| 6. | Geothermal heat pumps circulate water through pipes buried ) deep in the ground.
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| 7. | When boiling water, the circulating water spreads the heat and prevents hot spots.
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| 8. | It uses a motor to circulate water through the tubes.
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| 9. | The host maintains the microenvironment of the burrow by circulating water with its pleopods.
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| 10. | The waterfall helped fill and circulate water in a lagoon.
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