n. a unit of instruction
n. a task assigned for individual study
n. 课, 课业, 教训
1. The teacher gave us a new lesson today.
老师今天给我们上了一个新课。
2. I learned a valuable lesson from my mistake.
我从我的错误中学到了一个宝贵的教训。
3. We have a math lesson every Monday morning.
我们每周一早上都有数学课。