... four dimensional tensor || 四维张量 four dimensional vector || 四维矢量 four dimensional velocity || 四维速度 ...
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Secondly, we investigate the energy density produced by a state vector which is the superposition of three single electron states in the Dirac field in the four-dimensional Minkowski spacetime.
然后，研究了在四维平直时空下三个单粒子态构成的量子态的负能密度。
By defining four dimensional 'deformation event', the spring's equation about deformation and elasticity becomes perfect covariant 4-vector one.
在严格定义四维“形变事件”后，弹簧的形变—弹力方程被表达成完全协变的四维矢量方程。
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