| 正面 | 4585.validity 英 [və'lɪdɪtɪ]美 [və'lɪdəti]     |
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| 背面 |     释义： 1、val- "be strong" + -id.2、含义：strong, effective, having force in law, legally binding, supported by facts or authority.3、valid + -ity.n. [计] 有效性；正确；正确性 例句： 1. Scientists are becoming increasingly unsure of the validity of this technique.科学家们越来越拿不准这一技术是否正当合法。 validity (n.)1540s, from Middle French validité or directly from Late Latin validitatem (nominative validitas) "strength," from Latin validus (see valid)." |