"Since we have introduced the feed-in tariff, we have seen a strong increase in the production of power from wind,from biomass and from solar power.

VOA: standard.2010.03.23

And he had a stage theory, which was quite different from the Freudian stage theory that we have been introduced to.

他提出了一个阶段理论,这个阶段理论与我们之前所介绍的,弗洛伊德的阶段理论有着很大的不同

耶鲁公开课 - 心理学导论课程节选