nuts and bolts

1.She has invented a nifty little gadget for undoing stubborn nuts and bolts.

她明了一种灵巧的小工具用来松开紧固的母。

2.If we look at the nuts and bolts of the plan, what problems are there?

如果我们探讨一下份计划的基本要点，什么问题？

3.He worked there for two years, long enough to learn the nuts and bolts of the business.

他在那里工作了两年，已经学了那个行业的基本知识。