"一蹶不振"用英語怎麼說？

“一蹶不振”，漢語成語，意思是一跌倒就再也爬不起來（unable to get up after a fall），比喻遭受一次挫折以後就再也振作不起來。可以翻譯爲“collapse after one setback；never be able to recover after a setback”。

例句：

我想這個決定對他是個沉重的打擊，從此以後他一蹶不振。

I think the decision was a bitter blow from which he never quite recovered.

這場比賽要麼使他一舉成名，要麼使他一蹶不振。

This competition will either make him or break him.