以下为句子列表:
英文: A parameter known as the mass density- that is, how much matter per unit volume is contained in the Universe - determines which of the three possibilities applies to the Universe.
中文: 以“质量密度”闻名的一个参数-也就是,在宇宙里含有多少单位体积物质–确定三种可能性哪一种适用于宇宙。
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英文: The total dislocation length per unit volume of material; alternately, the number of dislocations that intersect a unit area of a random surface section.
中文: 材料单位体积内的位错线的总长度,或者在一个随机切面上的单位面积内切断的位错根数。
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