The contributions of the multipole transitions to the opacity of hot and dense plasmas of gold are taken into account by using an average-atom model.
使用平均原子模型研究了电四极及更高阶跃迁对高温稠密金等离子体辐射不透明度的贡献。
Their standard model treats the universe as though its density did not vary from place to place but had a uniform, average value of one atom per cubic meter.
标准模型将宇宙视为一个均匀结构，密度不会随著空间位置而变化，每立方公尺平均有一个原子。
The average ionizations computed by the average atom model are compared with experimental data.
用实验数据检验了用平均原子模型计算的平均电离度。
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