"you'd have to go to the back of beyond to find one of those"
backn.后面;背脊;靠背;后背;后卫vt.支持;后退adv.向后地adj.向后的;后面的;偏远的;过时的;积欠的
back off后退;放弃,撤回(主张等);倒车;让步,屈服