Доброе время суток!
Можете подсказать мне смысл нижеприведенного стихотворения и что означает day-flies.
Заранее, спасибо!

If in loving, singing, night and day
We could trifle merrily life away,
Like atoms dancing in the beam,
Like day-flies skimming over the stream,

Or summer blossoms, born to sigh
Their sweetness out and die..
How brilliant, thoughtless, side by side,
Thou and I could make our minutes glide!

No atoms ever glanced so bright,
No day-flies ever danced so light,
Nor summer blossoms mixt their sigh
So close, as thou and I