momentum
definitions
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noun
The quantity of motion of a moving body, mass times velocity; figurative force or impetus.zh: 动量;势头
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noun
A brief period of time; a specific point in time.zh: 片刻;时刻
examples
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The car gained momentum.
汽车加速了。
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At that moment, he realized.
那一刻,他意识到了。