短語(yǔ)詞組短語(yǔ)radioactive E substance 放射性物質(zhì)beta radioactive substance 貝他放射物質(zhì)beta -radioactive substance 貝他放射物質(zhì)short lived radioactive substance 短壽命放射性物質(zhì)atmospheric radioactive substance [氣象][核]大氣放射性物質(zhì)chemistry of radioactive substance [核]放射性物質(zhì)化學(xué)artificial radioactive substance 人工放射性物質(zhì)seeking radioactive substance 親血細(xì)胞型放射性物質(zhì)airborne radioactive substance 氣載放射性物質(zhì) 返回 radioactive substance