➡️【英语】The lesson learned from st

The lesson learned from sth. 从某事中学到的教训

Here "lesson" isn't a subject that you take at school, it's an experience that acts as a warning or an example for what to do or not to do, next time.

在这里，“lesson"不是你在学校里的科目, 而是作为警告的一种经验， 或告诉我们下次该做什么， 或不该做什么的例子。

e.g.

The biggest lesson learned from that first month was to always keep a written record.

= I learned from experience in the first month to always keep a written record.

第一个月里，我学到的最大的经验教训是：一定要保存书面记录。