在这种情形下他又冗长地说明这个问题.On this occasion he dilated at great length on the subject.缺少考虑地或冗长地说话.To chatter thoughtlessly or at length.反复地或冗长地讨论; 喋喋不休地讲.To discuss repeatedly or at length; harp on....

“冗长地”的英语可以翻译为：prolixly，verbosely，lengthily ...