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Article 20 Retroactivity
第20条 追溯效力
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To trace the origin or development of(a word.
追溯追溯（一个词的）根源或发展
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To trace and state the etymology of.
追溯字的词源追溯、阐述或说明…的词源
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To trace the origin or derivation of.
溯源追溯…的源头或起源于…
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a going back in time or upward in genealogical succession.
家谱系统在时间上的追溯或上溯。
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dates back to 20, 000 years B. C..
可以追溯到公元前20000年。
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The legislation was made retrospective.
该项法规具有追溯效力.
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a retrospective pay rise
有追溯效力的加薪.
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retrace the progress of civilization
追溯人类文明的进步
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trace its origin back to the time of
它的来源可追溯到…时代
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This custom can reach back Tang Dynasty.
这个风俗可追溯到唐朝。
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line of descent traced through one side of the family.
追溯家庭某一方的血统。
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The story goes back to the middle of the nineteenth century.
故事追溯到19世纪中叶。
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(of laws,payments,etc)applying to the past as well as the future;retroactive
（指法律、支付关系等）溯及既往的,有追溯效力的
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Traceability:ability to trace the history, application or location of that which is under consideration
可追溯性:追溯所考虑对象的历史、应用情况或所处场所的能力。
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The castle dates back to Roman times
该城堡可追溯到罗马时代。
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The legend dates back to(the)16th century
这个传说可追溯到16世纪。
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Horse racing has been traced to the Olympic Games of about600 BC.
赛马可追溯到公元前600年的奥运会。