The ones below are "floating" auxiliary intake louvres, they open and close under the impact of air pressure differential, not just a high AoA as far as I know. Anyway they let additional air in. Inside, there is a anti-FOD mesh, which if retracted rests on the lower inner surface of the air intake, over the intake louvres. If extended, it blocks (larger) FOD from entering the engine... or well, cuts it into smaller pieces :-)
The grilles on the sides (both outside and inside of each airtake) are "air by-pass outlets" for braking the supersonic air stream (bleed off boundary later) in the air intake front part. They let air out.