组成核心的物质呈涡旋状靠近黑洞，并在这一过程中与大量磁场结合，且其速度接近光速。
The core is made up of matter that swirls closer to the black hole and approaches the speed of light, combining with tremendous magnetic fields in the process.
速度矢量表现出顺时针涡旋转动。
本文由粘性流体动力学方程组导出溶潭内涡旋、速度及温度的分布。
The distribution of vorticity, velocity and temperature of the melt puddle were obtained by the viscous hydrodynamic equations.
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