instructive
adj
(approv 褒) giving much useful information 提供丰富知识的; 有益的
instructive books 有教育意义的书
The minister's visit to the prison was not instructive. 这个牧师这次探监没有什麽有益的贡献.
All he knew was that his African ancestor taught his son and grandson the words in his own language for river and guitar.
他所知道的只是非洲祖先用自己的语言教给儿孙们的“江”和“吉他”这两个词。
Professor Karl von Frisch, an Austrian scientist, spent many years of his life researching the amazing ways honey bees communicate in their dark hives.