all in one piece意思是“完好无损地,安然无恙”,是一句常用俚语all in one piece(=in one piece)。

【例句】
She arrived all in one piece.
她安然无恙地到达了。

At least we're all in one piece and you know what, I bet we can find some other place to put the show on.
起码大家都毫发无损地在这儿，我想我们肯定能再找个地儿继续演出。