"know forwards and backwards" in Chinese (Simplified)

• 烂熟于心
• 非常熟悉

Definition

对某事非常熟悉，全部细节都清楚；已经完全掌握或记住。

Usage Notes (Chinese (Simplified))

属于口语表达，用于表示对某事极为熟悉、掌握到细节层面，尤其适合指对流程、知识点等完全掌握的情况。

Examples

I know this song forwards and backwards.

这首歌我**烂熟于心**。

She knows the rules forwards and backwards.

她**对规则烂熟于心**。

Do you know the answer forwards and backwards?

你**知道**答案得非常熟吗？

He knows his speech forwards and backwards, so he isn't nervous at all.

他**演讲内容烂熟于心**，所以一点也不紧张。

You can ask her anything about the project—she knows it forwards and backwards.

你可以问她关于这个项目的任何事，她**都烂熟于心**。

By the end of training, you'll know this process forwards and backwards.

培训结束时，你一定会**把这个流程掌握得烂熟于心**。