Just a tip, because this is such a massively common error amongst learners of English, but "explain" can't take an indirect object in that manner. It's like "say" or "fix". We just say "Can somebody explain this sentence?" If it's really necessary to specify the target of the explanation, you can add something like "for me" to the end.
I actually learnt "taket" before doing this, because the phrase "I saw a cow on the roof" (jeg så ei ku på taket) is the sentence that this Danish boy and Swedish girl try to say in each other's languages in this amusing video: https://www.youtube.com/watch?v=K8U6FixTtOw They should add Norwegian.