Clearly, Holmes is a... loose cannon.

很显然，福尔摩斯一贯我行我素。

A good word to describe a loose cannon is unpredictable.

形容" loose cannons" 的一个很恰当的词就是" 不可预知（unpredictable）" 。

But I would not describe a loose cannon as fickle.

但是我不会形容难以控制的人反复无常。

Adam's very talkative, but he's a loose cannon at times.

亚当是个很健谈的人，但有时他说话不经脑子。

So where did the expression " loose cannon" come from?

那么，" loose cannon" 这个表达怎么来的呢？

And you don't want that? You don't want a loose cannon?

你不希望要那样的人吗？你不想要一个我行我素的员工？

Loose cannons, on the other hand, are often unpredictable in violent ways.

然而，难以控制的人在暴力方面往往令人无法预料。

You are not sure how loose cannons will react to something.

你无法确定一个难以控制的人会如何应对某事。

We can say the same about a person who is a " loose cannon" .

那么不受控制的人（loose cannon），也同样会这样。

Wow! I'm feeling our neighbors are a collection of loose cannons.

哇！我感觉我们的邻居是一群难以控制的人。