r - 是否可以在格子底部放置面板标签？

Question

是否可以在底部而不是顶部放置面板标签（即 3gears、4gears...）？

# Lattice Examples
library(lattice)
attach(mtcars)

# dotplot for each combination of two factors
dotplot(cyl.f~mpg|gear.f,
        main="Dotplot Plot by Number of Gears and Cylinders",
        xlab="Miles Per Gallon")

谢谢！