VOA慢速英语:Without Them, Machines Fall Apart

短语讲解：

1. The top leaders are always well-known, but not those who work with the nuts and bolts.

work with 与…在一起干; 从事…工作
例句：I work with disabled athletes.
我的工作就是帮助残疾人运动员。

2. He meant, of course, the talks would concern all the necessary elements to make joint action successful.

of course 当然，自然
例句：Of course they overdid it.
他们当然过度报道了。

3. But much more time is spent on the nuts and bolts -- generally called logistics -- of how to transport and supply an army.

 spend on 把…花在…;
例句：This they spend on merchandise.
这些钱大多花在了周边产品上。