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It will be a particle with a positive charge and a positive mass.
它将是一个带着正电荷和正质量的粒子。
youdao
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Suppose this particle 1 has a mass five and the velocity is one.
假设这个粒子，质量为5，速度为。
youdao
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This particle has a very small mass.
这种粒子的质量很小。
youdao
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This particle has a very small mass.
这种粒子的质量很小。
youdao