the ins and outs of something------详细情况（非正式）

英文释义
(INFORMAL) Expression referring to the details of something such as a process; the complicated procedures by which something is operated.

例句
It took me a long time to learn the ins and outs of my new job as a manager.
我花了很长时间才了解了我的新的经理职务的详细情况。