可以组成单词helpful,意思是:adj.有用的有益的有帮助的愿意帮忙的。
例句:1.She made helpful comments on my work.
她对我的工作提出了有益的意见。
2、"This is a very sensible way for an animal to make decisions in the wild and would have been very helpful for humans for thousands of years."
"这是动物在野外做决定的一种非常明智的方式,几千年来对人类都是非常有益的。"