Knitting Problem

Not sure if this is the right category, but I couldn't find a better one...

It might be a language problem.
I have a knitting pattern here and they are using left and right twists.
No picture, just a description, but I don't get it.

Left Twist: Purl into the back of the 2nd stitch on the left hand needle, then knit the first stitch, slipping both stitches off the needle

Right Twist: Knit into the front of the 2nd stitch on the left hand needle, purl the first stitch, slipping both off the needle

Can anyone help and explain?