gist

要旨、大意、主旨

I missed the beginning, but I got the gist of her argument.

我错过了开头，但大致抓到了她论点的要旨。

精髓、核心

The gist of the whole plan is to cut costs without firing anyone.

整个计划的核心就是在不裁员的情况下降低成本。

听懂大概、抓到重点口语

My French is poor, but I get the gist when people speak slowly.

我的法文很差，但别人讲慢一点我就能听懂大概。