Terms for subject Engineering geology containing background

English	Chinese
background activity	放射性背景值
background contrast ratio	背影反差比
background counting	本底计数
background level	背景含量
background mineralization	背景矿化
background monitoring well	背景监测井
background noise	声背景值
background polarization	背景极化激发极化法
background sample	正常样品
background sample	背景样品
background science	基础科学
background substract	扣本底
X-ray background	X 射线本底
X-ray background	X 射线背景