informative

形容词 informative:

1. tending to increase knowledge or dissipate ignorance
   同义词：enlightening, illuminating
2. serving to instruct of enlighten or inform
   同义词：instructive
3. providing or conveying information
   同义词：informatory

1. Full of news; informative.
   充满信息的; 内容充实的
2. I dare say anything he had to say in the lecture would have been old stuff to you but since I'm not an anthropologist I found it very interesting and informative.
   我想他在讲演中所要说的每个问题，对你来说，都可能是老生常谈，但是，因为我不是人类学家，我倒觉得它趣味横生，资料丰富哩。
3. Sam placed his new book on one side for a year while he wrote some magazine articles and informative material.
   萨姆把写新书的工作搁置了一年时间，在这段时间里他写了一些杂志文章和报道材料。
4. It will be most interesting and informative to hear Mr. Smith.
   届时能聆听到史密斯先生演讲，定会是极为有趣和增长见识的。

in.form.a.tive

adj.（形容词）
Serving to inform; providing or disclosing information; instructive.
提供资讯的，有益的：为…提供信息服务的；提供或揭露信息的；增长见识的

【引伸】
inform.atively
adv.（副词）
inform.ativeness
n.（名词）