[填空题]
One means of enriching uranium is bhnjjx1 wza,+c wu(n2 ca)g9s/yd+yo6y mf3uy;y qc, 6mdiffusion of the gas $\text{UF}_6$. Calculate the ratio of the speeds of molecules of this gas containing $_{92}^{235}\text{U}$ and $_{92}^{238}\text{U}$ on which this process depends. :1