单词	助於世
释义	同BENEFICIAL
随便看	operating window operating ystem operation operation acknowledge operation acknowledge--opack operation acknowledge，opack operation address instruction operation address register operation-address register operation adjustment operational operational accident rate operational accounting and analysis system operational accounting and analysis system，oaas operational address instruction operational address register operational address register，oar operational admittance operational aircraft operational altitude operational amplifier operational amplifier circuit operational amplifier--oa operational amplifier (opamp) operational amplifiers