求解释下面这段程序

张文贺

go devedit
base.mesh height=25 width=25
bound.cond apply=false max.ratio=300
constr.mesh max.angle=90 max.ratio=300 max.height=15 max.width=15 \
        min.height=0.001 min.width=0.001
constr.mesh type=Semiconductor default
constr.mesh type=Insulator default max.angle=170
constr.mesh type=Metal default max.angle=180
imp.refine min.spacing=0.5
imp.refine imp="phosphor" sensitivity=0.5
imp.refine imp="Boron" sensitivity=0.5
mesh