learn from 向...学习
learn about 了解...
learn how to 学会如何...
learn the lesson 吸取教训
learn by heart 背诵
1. She learns a new language every year.
她每年学习一门新语言。
2. My brother learns piano in the afternoon.
我哥哥下午学钢琴。
3. He learns quickly when he is interested.
当他感兴趣时，他学得很快。
4. You learn more by doing than by reading.
实践中学到的比书本上学到的更多。
A: How does your sister learn English?
A：你姐姐是怎么学英语的？
B: She learns by watching American movies.
B：她通过看美国电影来学习。
1) 获取知识或技能
2) 得知消息或真相
3) 学会（某种行为或技巧）
1. 学习；掌握
e.g.
He learns mathematics at school.
他在学校学习数学。
2. 得知；获悉
e.g.
I was sorry to learn of his illness.
得知他生病，我很难过。
verb
1. to gain or acquire knowledge or skill by study, investigation, or exposure.
2. to discover or be informed of.
Synonym: acquire, study, grasp