Question

一个 史上很难 的英语句子的解释-------------不是高手勿进

Doctor are known to be terrible pilots. They don’t listen because they already know it all. I was lucky：【I became a pilot in 1970, almost ten years before I graduated from medical school】. I didn’t realize then, but becoming a pilot makes me a better surgeon. I loved flying. As I flew bigger, faster planes, and in worse weather. I learned about crew resource management（机组资源管理）, or CRM, a new idea to make flying safer. It means that crew members should listen and speak up for a good result, regardless of positions.
请解释【】里的句子，我记得：时间段+ before ，所以ten years before I graduated from medical school翻译为：十年后后，我从医学学校毕业。不知道是否正确？高手详解，到底是翻译为“十年前”还是“十年后”，并说出支持你的理由。谢谢

Answer 1

就是说他1980年从医学院毕业呗