positive ray 阳射线
positive ray parabolas [物] 正射线抛物径迹
positive-ray method 阳离子射线法
positive-ray current 阳射线电流
positive-ray parabolas 正射线抛物径迹
positive x-ray photoresist 正性x射线光刻胶
ray positive
雷积极
以上为机器翻译结果，长、整句建议使用 人工翻译 。
X-ray positive rate is significantly higher than the positive rate of signs.
线阳性率明显高于体征阳性率。
youdao
Man Ray in the 1920s used solarisation, which gives photographs negative and positive characteristics, a perfect technique for a surrealist.
ECONOMIST: Snapping up the past
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