缩写	全称	中文释义
SIGNAL	Stream Invertebrate Grade Number Average Level	河流无脊椎动物等级数平均水平
SIGNAL	System Integrating Gps To Nullify Absence And Lateness	系统集成GPS消除缺席和迟到
SIGNAL	Statistical Indicators Of Growth, Navigation, Alignment, And Learning	增长、导航、校准和学习的统计指标