We can only speculate at the core composition of mercury, but it has a very high density for its radius so it is likely to have a large metallic core accounting for most of its mass.
2
汞弧光放电是一种低气压气体放电现象，放电电流密度大。
The discharge of mercury arc is electric discharge phenomena of low pressure gas and the current density is great.
3
而在缺陷密度比较大的碲镉汞材料中，砷的分布呈多段指数型分布，表现出更复杂的多机制扩散特性。
While in HgCdTe with high dislocation density, the arsenic distribution is complex, exhibiting multi component exponential distribution.
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