Englishfor English speakers
chain
Noun
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A chain is a series of round pieces of material joined together to make a line.
He got her a gold chain necklace for her birthday.
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A series of interconnected things.
This led to an unfortunate chain of events.
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A chain of stores is a group of stores that all have the same name, such as McDonald's restaurants or GAP clothing stores.
chain
Verb
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If you chain things together, you connect them in a line.
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If you chain A to B, you connect A to B with a chain.
The dog was chained to the tree.
formula
Noun
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A formula is a way to do something or solve a problem that does not change much.
There is no formula for making profit, yet many business people think there is.
The formula for converting from kilograms to pounds is mathx\ \mathrm{kg} \times 2.2/math
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Infant formula is a powder that you mix with water to make a drink for babies.