Zui doesn't understand fairy talk at all, more's the pity.
If we understand fairy tall, does it mean that the artist is translating for us, or does that make us potential Admiral candidates?
Artist is translating so we get the joke. There's no audience presence/a strong fourth wall in this series.
In that box, something...Akashan!Box?
Ahh.The waste box, right?Waste?WASTEYep!In there is the equipment that's broken - we can't use them any more.Later, they'll be scrapped, and the resources recovered.Zuikaku don' get it!!Scrapped... throw...Thrown away?If they can't be scrapped and recovered, then they're disposed of...
In short, they're thrown away.