Whenever I bring clouds over the earth and the rainbow appears in the clouds.

我使云彩盖地的时候，必有虹现在云彩中。

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The rainbow always after the rain, sunshine always after black clouds, success in the fall.

彩虹总在风雨后，阳光总在乌云后，成功总在失败后。

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After every shower of rain, just as the sun burst through the clouds, a beautiful rainbow would appear in the sky.

每当下完雨以后，太阳穿过云彩，一道美丽的彩虹就会出现在空中。

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"When it looks like the sun isn't going to shine anymore, God put a rainbow in the clouds, " sung the 74-year-old, hosted onto the stage by Rastafarian poet Benjamin Zephaniah.

BBC: Angelou's rainbow of poetry