helpful的形容词无助的

　　The booklet should be very helpful to parents of disabled children.

　　这本小册子对于残疾儿童的父母会很有用。

　　Contact with other disabled yachtsmen of like mind would be helpful.

　　联系一下其他具有同样想法的残疾帆船赛手是会有帮助的。

　　The dietitian was helpful, making suggestions as to how I could improve my diet.

　　这位饮食学家很有帮助，就我如何能改善膳食提出了建议。

　　The catalogue includes helpful information on the different bike models available.

　　该目录包含所销售的各种型号自行车的有用信息。