[comp.lang.postscript] How to center string with different fonts?

xiaofei@ACSU.BUFFALO.EDU (XiaoFei Wang) (06/19/91)

How to center string like

``T Lambda n arrowup''

or 

``T[sub]Lambda n [sup] arrowup''.

The normal method to center a (string) does not work here. 

Is that possible to make s tring of different fonts?