Fall through the cracks

fall through 是落空的意思，而crack是裂缝的意思。

bureaucratic crack 是法令﹑制度和程序的不全或漏洞。

To Fall through a crack 或 fall through the cracks 是在工作中分心而忘记做或没有很好地解决某件事情.

如果上下文指示crack为bureaucratic crack之意，则 fall through the cracks是指百姓的权益因法令﹑制度和程序的不全或漏洞而受到损害。

      Despite the so-called social safety net, many poor people fall through the crack and never get the benefits they deserve.

     Somehow the child fell through the bureaucratic crack and didn’t get the proper schooling required by laws.