形容詞 introductory:

1. serving to open or begin
2. serving as a base or starting point
   同義詞：basic
3. serving as an introduction or preface
   同義詞：prefatorial, prefatory

1. An introductory list of highlights from the program or text that follows, as in a broadcast or magazine.
   插播節(jié)目或文章之前的一段介紹性目錄的要點，如在廣播或雜志中
2. An introductory occurrence or fact; a preliminary.
   開端預兆性事件或事實; 開端
3. An introductory performance, event, or action preceding a more important one; a preliminary or preface.
   序幕先于較重要部分的介紹性表演，事件或行動; 開端或序

in.tro.duc.to.ry

adj.Abbr. intro.（形容詞）縮寫 intro.
Of, relating to, or constituting an introduction.
介紹的：屬于、關(guān)于、或組成介紹的
Serving to introduce.See Synonyms at preliminary
初步的：作為引言的參見 preliminary

【引伸】
in.troduc.torily
adv.（副詞）