应该是 learn aboutlearn about
获得, 学得 如， I like reading historical stories because I can learn about the lives that people led long ago.我喜欢看历史故事, 因为这样可以知道过去人们的生活。得知有关…的消息如，How did you learn about the meeting?有关会议的情况你是怎么知道的? know about
知道, 了解 如： I happened to know about him.我正巧知道一些有关他的情况。...
