英语词汇“helpful”的读音、翻译、释义、用法及例句-智慧网

词汇	helpful
释义	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。
随便看	plate-to-plate calculation plate-to-plate impedance plate tower plate transformator plate transformer plate tuning circuit plate tuning oscillator plate turn plate turnover plate type plate-type blanking die plate type changeover valve plate-type condenser plate type contraction joint plate-type delivery valve plate type electrostatic dust-precipitator plate type electrostatic separator plate-type evaporator plate-type exchanger plate type feeder plate-type fertilizer distributor plate type finned heat exchanger pinion shaft pinion shaft outside bearing pinion shaped cutter

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