Helping others is one of the greatest satisfactions of my life.帮助他人是我生活中最大的乐事之一。Playing tennis is one of his greatest satisfactions.打网球是他最大的乐趣之一。Being a parent is one of the great satisfactions in life.为人父母是人生中的一大乐趣。Playing the piano was one of his greatest satisfactions.弹钢琴是他最大的乐趣之一。