以下为句子列表：
英文: In order to verify the natural radioactivity level, of tin polymetallic ore in Southeast Yunnan, and find out radioactive pollution in mining, dressing and smelting processes, 10 tin ores in this area were chosen to measure radionuclides' specific activit
中文: 摘要为查明滇东南锡多金属矿天然放射性水平，了解锡矿采、选、冶过程中的放射性污染，选择了该区10个锡矿山，测量了各类锡多金属矿原矿、精矿、尾矿及冶炼炉渣放射性核素比活度。
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英文: Physical and chemical tests verify that this Recovery Device has neither radioactive pollution nor toxic side effects.
中文: 经理化检验证实：使用该器无放射性污染，对人体绝对无毒无副作用。
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