backboneKK [ˋbækˏbon] /ˈbækˌboʊn/发音名词1脊椎、脊柱、背脊She injured her backbone in a skiing accident last winter.她去年冬天滑雪时伤到了脊椎。2支柱、骨干、中坚Small farms are still the backbone of the local economy.小型农场仍然是当地经济的支柱。3骨气、胆识、决心He lacked the backbone to stand up to his boss.他没有胆识去跟老板据理力争。4主干网路、骨干网路电脑The fiber backbone carries traffic between the two campuses.这条光纤主干网路负责两个校区之间的流量。用这个字练口说→