Suddenly the kids,who had been eavesdropping,flew into the room.突然间，一直在偷听的孩子们飞进屋来。We caught him eavesdropping outside the window.我们撞见他正在窗外偷听。She knew you were going to have a baby. She must have been eavesdropping on you...
a university with a high dropout rate退学率高的大学There is a high dropout rate from some college courses.有些大学课程的退出率很高.He might be a college dropout but he's made a fortune in business.他可能中途离开大学,但在商界发了财....