helpfulhelpfulD.J.:[ˈhelpful]K.K.:[ˈhɛlpfəl]adj.1.■给予帮助的, 有益的Our teacher gave us a lot of helpful books in maths.我们老师给了我们许多数学上有帮助的书。
helpful['helpful]adj.1.■给予帮助的;肯帮忙的2.■辅助的,有帮手的3.■有用的,有益的;建设性的4.■令人鼓舞的
helpfulhelpful[ˈhelpful]adj.1.■有帮助的, 有益的, 有用的You've been very helpful.你(给我们)帮了很多忙。
继承用法helpfullyadv.helpfulnessn.