帮忙翻个小短句~

Nothing elapsed would return.
过往之事不可回。

No hand can make the clock strike the hours that are passed.
没人能攫住逝去的时光。

这两句比较地道，也比较符合你的要求。

What done is done.
木已成舟。

比较口语话^_^

nothing can go back to the first appearance.
比较简洁易懂

nothing can tear up the hands of clock that tick away the ours.