例句：

　　She made helpful comments on my work.

　　她對(duì)我的工作提出了有益的意見

　　She helpfully suggested that I try the local library.

　　她很熱心地建議我試試本地的圖書館。

　　The worst part is being helpless to change anything.

　　最糟糕的是沒有能力改變?nèi)魏问虑椤?/p>

　　They helplessly watch the crops being flooded.

　　他們眼睜睜地看著莊稼被水淹了。

　　Secondly, the feature matching of image is explored helpfully.

　　然后，在圖像特征匹配方面做了有益的探索。