知识拓展 give/offer aid 援助                come to sb.'s aid 帮助某人 cut off aid （突然）终止援助        a hearing aid 助听器 teaching aids 教具                 medical aid 医疗救护 with the aid of 借助于 in aid of为了帮助

n /U/帮助; 援助 Teachers give their lessons with the aid of computers. He raised money in aid of the sick.