This is a lovely little snippet of a poem.

这是一个可爱的小片段
The point of it is to say that the child, delighted by the rainbow,

它的重点是诉说因为彩虹而很高兴的小孩
gives you the man, delighted by the rainbow,

给你因为彩虹而很高兴的人
and he says, "Let me die if I'm no longer delighted,

那人说"如果我不再快乐就让我死去吧
if I get to be so old

如果我变得很老
that that childlike delight in the rainbow is gone. "

而且那份孩子似地快乐已经远去"
The rainbow comes freighted with its own biblical literary history:

彩虹有它圣经上的文学历史
that is, it's the sign of God's promise to the world, to humankind,

即是上帝对世界人类的许诺的记号
that God will no longer send a flood

许诺上帝不再让洪水来消灭人类
to wipe out the human race as He did in the days of Noah.

正如他在诺亚的时代所做的那样
So, it is a hopeful sign for the fate of humankind,

所以这是一个对人类命运充满希望的符号
and it reflects well on God's intentions towards us.

很好的反映了上帝对我们的意图