The expression " the long and short" of something means that is correct.

某事的“长短” 表达是正确的。

" To be short of" something usually means that you're almost there.

“缺少”某事通常意味着你快到了。

" To be short of" something means also not to have enough of something.

“缺少” 也意味着没有足够的东西。

We often use the expression " to be short of" something when you don't have enough of something.

当你没有足够的东西时，我们经常使用“缺少”这个表达方式。

" To tumble short of" something is to fall before you are able to reach whatever destination you are trying to get to.

“To tumble short of”是指在你能够到达你想要到达的任何目的地之前，某物掉落了。

That we were one or two inventions short of something where it was very good at reading and writing and therefore being an assistant.

我们只差一两项发明就可以很好地阅读和写作， 因此可以成为一名助手。

So, if you tell someone the long and the short of something, you're giving them a very good summary of the information that you have for them.

因此， 如果您告诉某人某事的长短，您就是在向他们很好地总结您所掌握的信息。