adj.提供消息的；情报的；见闻广博的
The poll cited by the author is too vague to be informative. 由作者引证的民意测验太含糊，不能提供有效的信息。
Man's sense of smell is much less informative than his sight. 人的嗅觉提供的信息远不如视觉。
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。
