doily help

Can someone please help me understand what this means...."Ch 3, dc in same st as beg ch-3, sk 3, sk 1 dc, (2 dc in next dc, ch 3, sk 1 dc) rep around.
I understand that ch. is 'chain' and dc is 'double crochet. But what does sk mean? From googling it, it seems it means to skip a stitch - but how do I skip 3 st and then 1 dc when the preceding round was all dc?
I'm still a beginner to crocheting, but this pattern said it was beginner friendly! Any help would be appreciated. Thanks!