短語詞組短語positive e electron 正電子positron positive electron 正電子positive electron affection 陽電子親合力slow positive electron beam 慢正電子束positive electron affinity 正電子親合力positive electron beam photoresist 正性電子束光刻膠positive electron tomography 正電子體層成像;斷層掃描;正電子發(fā)射斷層掃描 返回 positive electron