没有什么好伤心的，只有令人兴奋的未来和新的挑战等着你。

There's nothing to be sad about today, there's only the exciting future and new challenge waiting for you.

youdao

生活中有些事会令你伤心，你遇到了对你很重要的人，但是到最后却发现没有任何意义，不得已，只好放手。

A sad thing in life is, you meet someone who means a lot to you, only to find out in the end that it was never meant to be, and you just have to let go.

youdao

是啊，大概你没有过，我们的感觉如此不同，多么让人伤心。

Well perhaps not, it's probably so sadly different.

youdao