单词	对比定律〔地层〕
释义	同相关定律〔器官〕--对比定律〔地层〕
随便看	operational amplifier circuit operational amplifier--oa operational amplifier (opamp) operational amplifiers operational amplifiers {= opamps} operational amplifier，oa operational analysis operational and business support system operational and business support system {=obss} operational announcing system operational approach operational attributes operational audit operational auditing operational availability operational bypass operational calculus operational capability operational capability release operational category operational ceiling operational center operational chain of command operational character operational characteristic