to get down to brass tacks 讨论实质问题（成语）

英文释义

To address the basic and most important details of a problem, disagreement, or complicated problem.

例句

The owners of the two rival companies knew they needed to resolve their dispute, so they had a meeting, and when they got down to brass tacks they found a solution to their problem.

这两家竞争企业的老板知道，他们需要解决争端。因此，他们开了一次会，讨论了实质问题，并找到了问题的解决办法。