Most countries adopt metric system and so his country did.
Most countries adopt metric system.
Britain changed to a metric system of currency in 1970.
People in many countries use kilograms, centimetres, square meters, litres, and Celsius. These are all ways to measure things. They are all part of the metric system.
Successful French metrological diplomacy meant that in the ensuing decades the metric system supplanted a hotchpotch of regional units in all bar a handful of nations.
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