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环境基准
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环境基准
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environmental criteria
环境基准
环境中的污染物对特定受体的无作用剂量(浓度)或阈剂量(浓度),其受体通常为人或其他生物。无作用剂量指对受体不产生不良或有害影响的最大剂量;阈剂量指对受体产生不良或有害影响的最小剂量。又称环境质量基准。
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national language control
National Language Institute
National Language Monthly
National Language Movement
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National Language Resource Monitoring and Research Center
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national language situation
national language text to speech
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national-level teaching group
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