“four-current density”的概念、定义、翻译、参考文献-科学参考

单词	four-current density
释义	four-current density [¦fȯr ¦kǝ·rǝnt `den·sǝd·ē] ^RELATIVITY A four-vector whose three space components are those of the ordinary current density and whose time component is the charge density.
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