名词 backseat:

1. a secondary or inferior position or status

2. a seat at the back of a vehicle (especially the seat at the back of an automobile)

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 to Food Safety Plan回到食物安全计划back-to-back testing背靠背试验,反馈试验back rayleigh scattering背向瑞利散射back-projection reader向后投影阅读机back-jack-knife dive向后屈体跳水back-transmitted pulse反向传递脉冲, 反射脉冲back-acting hay tedder反向作用式摊草机BACK POCKET WIDTH AT TOP后袋宽顶上量Back to bridge name list返回桥名列表back-mix-flow reacto返混流反应器