Englishfor English speakers
shutoff
noun
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A valve used to turn off something.
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The act of turning off something.
gate
Noun
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A gate is like a door in a fence. It opens to let people go through the fence.
Please open the gate for me; my hands are full.
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In computers and logic, a gate is something that gives a simple yes-or-no answer from two (or one, or more than two) yes-or-no things coming into it.
We need one more "and"-gate here so that it will give the finished answer.
valve
Noun
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A valve is part of a tube that lets liquid or gas go through one way but stops it from going through the other way.
There are four valves in the heart that let blood go in one direction but stop it from going in the other direction.
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A valve is part of a tube that someone can open or close to let water or other things go through.
Open this valve to let water go through the pipe.