图 4.
Focusing effect of electric field on VPL nuclei
电场在VPL核团处聚焦效果
a. 二维平面图以及VPL处局部放大图；b. VPL核团表面电场分布图
a. two-dimensional plan view and partial enlargement at VPL; b. surface electric field distribution map of VPL nuclear clusters
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