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....
The company undertakes mechanical work on all types of cars.该公司承接各类汽车的修理工作。He undertakes a dangerous job.他从事一项危险的工作.He undertakes a piece of work.他从事着一项工作....