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de·fi·cien·cy AHD[dĭ-fĭshʹən-sē] D.J.[dɪˈfɪʃənsiː]K.K.[dɪˈfɪʃənsi]n.（名词）pl. de.fi.cien.cies 【复数】- The quality or condition of being deficient; incompleteness or inadequacy.缺点，缺陷：不完善的性质或状况；不完整或不充足
- A lack or shortage, especially of something essential to health; an insufficiency:缺乏，缺少：不足，尤指对健康十分必需的东西；不够：a nutritional deficiency.营养缺乏
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