backingn.支持；背衬；伴奏动词back的现在分词.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-filling in layers分层回填back regression analysis反演回归分析Back to ice maker series返回制冰机专刊back-coupled generator反馈振荡器Back-flushing pressure反冲压力back reinfored knife saw夹背刀锯back-style high-jump背越式跳高backing-off attachment铲齿附件,铲磨工附件back-scattering factor反散射因子back silting of sediment泥沙回淤强度

1. It is a posterior view of the skull.
   这是颅骨背视图。