[] the act of bringing a product, service, system, etc. into use for the first time（产品、服务、系统等的）采用◆the introduction of new manufacturing methods新制造方法的采用 [] a product, service, etc. that is brought into use for the first time（产品、服务等的）推出◆We have begun the biggest wave of new product introductions in our history.我们掀起了我们历史上新产品推出的最大浪潮。 [] the act of making one person formally known to another（正式的）介绍，引见◆Shall I do the introductions (= tell people one another's names)? 让我来介绍一下。◆a letter of introduction(= a letter which tells sb who you are, written by sb who knows both you and the person who will read the letter)介绍信