Having taught sexology at various American and European universities for over 30 years, I know (or knew) most of the modern pioneers personally, and many became good friends.

• 我已经在美国和欧洲各个大学教授性科学超过了30年，结识(或曾经结识了)大多数现代先驱，而且许多先驱还成了我的好朋友。