There it is transformed into uranium hexafluoride, which in turn is sent to gas diffusion plant to be enriched.

Whereas purposeful men could make their way across a narrow bridge, the slow diffusion of plant and animals would require an avenue as a continent and available for ages at a stretch.

In this paper, a two-dimensional flow equation and a thermodiffusion equation are used to simulate the diffusion feature of the cooling water drained into Puyang River by Xiaoshan Power Plant.