单词	life-time body
释义	同 life-time body--burden
随便看	signal ammunition signal ampliffcaton signal amplification signal amplificaton signal amplificaton， signal conditioning signal amplifier signal-- amrking signal analysis signal analyzer signal and array processing signal and data processing circuits signal anxiety signal apparatus signal area signal-arm type signal aspect signal-- asynchronous signal attenuation signal averager signal averaging signal-- background signal-background ratio signal baler signal baler; black baler signal ball