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。