口语学习技巧|ins and outs 来龙去脉

短语ins and outs的字面意思是进进出出，里里外外，但它实质所表达的意思则是详细情况、细节，一件事情的来龙去脉，常用来形容一个人对任何事情了如指掌，一目了然。

例句

Ive been doing this job for ten years, so I know the ins and outs of how this place works^1.

我做这份工作已经十年了，所以我了解这里运作的所有细节。

Ive only been given the project this morning; I have no idea about the ins and outs.

今天早上我才接手这个项目，所以现在还完全摸不清头脑。

To be efficient at your job, you need to learn the ins and outs of all the processes.

要想工作有效率，你需要学习所有步骤的来龙去脉。