The Twilight covers are all supposed to mean something, and I know that the 林檎, アップル represents temptation, but what do the New Moon, Eclipse, and Breaking Dawn covers mean???

i don't if this is what stephanie meyer intended but this is what i think they mean -

new moon - Bella has a broken ハート, 心 and like the 花 she is slowly dying

eclipse - i think that the ribbon is supposed to be a piece of Bella red 上, ページのトップへ victoria got the new born vampire to steal

breaking dawn - the series is like a chess game the pieces are falling into place

hope this helps