"I live in the suburbs of Cairo in Egypt."

Translation: أَسْكُن في ضَواحي ٱلْقاهِرة في مِصْر.

[kokagejone]

Why no al-? (I think I get it, but I'm unsure.)

[Djibril487949]

It's a genitive construction : "the suburbs of Cairo" — so just as with "the engineer's cat," the subject doesn't take ال but the "possessor" (or in this case the larger-defining-entity) does.

[shakir.mol]

Is suburbs so important of a word to learn at this stage