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English word
mass
B2Frequent NGSL-2affecting or involving a large number of people or things
a large amount of a substance that does not have a definite shape or form
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The industrial revolution that we are part of, that my generation was part of, saw the mass production of something the world had never seen before.
Jensen Huang's Speech at Caltech
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But in order to get to orbit, this would require a substantial improvement in the mass efficiency and the engine efficiency and probably be a two-stage vehicle.
In fact, scientists have been warning that the sixth mass extinction may occur in a hundred years.
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