/,ɪntrə'dʌkʃn; ,ɪntrə`dʌkʃən/
n
1 [C, U] ~ (to sb) formal presentation of one person to another, in which each is told the other's name （正式的）介绍; 引见
*It is time to make introductions all round, ie introduce many people to one another. 是大家互相介绍的时候了.
* a person who needs no introduction, ie who is already well-known 不需作介绍的人（大家都知道的）
* a letter of introduction, ie which tells sb who you are, written by a mutual acquaintance 介绍信.
2 [C]
(a) ~ (to sth) something that leads up to the main part of sth (eg an explanatory article at the beginning of a book) 引至主要部分的事物（如书中的序言）
*a short, brief, detailed, general, long, etc introduction 短序、简短的序言、绪论、前言、长的序言
* The introduction explains how the chapters are organized. 前言部分说明各章的编排情况. Cf 参看 preface.
(b) ~ (to sth) textbook for people beginning a subject 入门（初级读物）
*`An Introduction to Astronomy' 《天文学入门》.
3 [sing] ~ to sth first experience of sth 对某事物的初次经历或体验
*his introduction to modern jazz 他对现代爵士音乐的初次接触.
4 [U] bringing into use or operation for the first time 初次投入使用或运作; 引进; 推行; 采用
*the introduction of new manufacturing methods 新的制造方法的采用.
5 [C] ~ (in/into sth) thing introduced, esp a new animal or plant species 引进的事物（尤指新动植物品种）; 引种
*The rabbit is a relatively recent introduction in Australia. 兔子在澳洲是较为近期引进的动物.
6 [C] (music 音) short section at the beginning of a musical composition, leading up to the main part 前奏; 导奏
*an eight-bar introduction 八小节组成的前奏.

n

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1【new system/product】
2【bring something to a place】
3【when meeting somebody】
4【book/speech】
5【music】
6【explanation】
7【new experience】
8【letter】

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【NEW SYSTEM/PRODUCT】[U]
the act of bringing something into use for the first time
introduction of
　the introduction of a range of new products
　With the introduction of independent taxation, a married woman's position is much clearer.
【BRING SOMETHING TO A PLACE】
a)[U]
the act of bringing something somewhere for the first time
introduction of
　the introduction of Buddhism to China nearly 2000 years ago
b)[C]
a type of thing that is brought somewhere for the first time
　The potato was a sixteenth century introduction.
【WHEN MEETING SOMEBODY】[C]
the act of formally telling two people each other's names when they first meet
　Pete, are you going to make the introductions ?
　Our first contestant needs no introduction (=everyone already knows the person) .
【BOOK/SPEECH】[C]
a written or spoken explanation at the beginning of a book, speech etc
　In the introduction he explains why he wrote the book.
　Mr Brown gave a brief introduction to the course.
【MUSIC】[C]
a short part at the beginning of a song or piece of music
【EXPLANATION】[C]
something that explains the basic facts of a subject
introduction to
　The book is a useful introduction to British geology.
【NEW EXPERIENCE】[C]
someone's first experience of something
introduction to
　an introduction to water sports
【LETTER】[C]
a letter by someone else that explains who you are, which you can give to a person you have not met before