background level

英 美
  • 本底水准,背景值
  • background n.背景;经历;幕后;后景vt.提供背景
  • level n.数量;等级;水平;水平线adj.平的;等高的v.弄平;夷平;对准adv.水平地
Noun:
  1. the amplitude level of the undesired background noise

    1. The background concentrations of ambient air pollutants were used as evaluation stan-dards.
      采用大气污染物浓度的背景值为评价标准。
    2. In the Campania region, baseline and background values are often coincident, where the samples represent catchment basins away from urban or industrial areas.
      在坎帕尼亚地区,样品代表的是远离市区或者工业区的汇水盆地,所以基线值和背景值经常是吻合的。
    【近义词】