显然，如果我们不能成功我会失望的，但天不会塌下来。

Obviously I'd be disappointed if we don't make it, but it wouldn't be the end of the world.

《柯林斯英汉双解大词典》

没有什么好怕的，天不会塌下来。

There's nothing to be afraid of. The sky won't fall down.

《新英汉大辞典》

天不会塌下来，书照样会留存后世，但是文化会下一个台阶，而最好的读者将永远无法知道他们错过了什么。

The sky won't fall, the books will survive, but the culture will ratchet down another notch, and the best readers will never know what they're missing.

youdao