backoutn.拆除；取消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 shot wheel反击式水轮机backhoe dredger反铲挖泥船back-arc area弧后区backing current反向电流back light unit背光单元back sweetening返回脱硫法back cavitation后空穴backreef facies后礁相back-stabbingadj.阴险的；小人的；暗箭伤人的back-up power后备电源

1. If the forum or blog is a respected one, a backlink is valuable.
   如果论坛或博客是一个尊重，一个反向链接是非常有价值的。