translation.en: And it was only in 1959 that a German team, after spending 20 years in search of these molecules, discovered, identified, the first pheromone, and this was the sex pheromone of a silk moth.
translation.zh: 一个德国的团队花了20年时间寻找这种分子， 终于首次在1959年 发现并且确定了第一个费洛蒙。 这是蚕蛾的性费洛蒙。