Ok in English it means:

Chain 41. 3 x double crochet in the 4th chain back from the hook. (This = 1st double crochet)
Skip the next 3 chains
Then
(single crochet, chain 3 and 3 double crochet in the next chain)
then skip 3 chain
Repeat from single crochet, chain 3 and 3 double crochet then skip 3 chains

Does that make sense?