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- 他追踪自己的世系上溯至一个古老的诺曼家族。
He traces his descent back to an old Norman family.
- 该项法规具有追溯效力。
The legislation was made retrospective.
- 我们两国之间的往来可以追溯到上个世纪。
The assiciation between our two countries can be traced back to last century.
- 这个家族的历史可以追溯到十七世纪。
The family can trace its history to the 17th century.
- 警方追溯了被谋杀者当时的动作。
The police retraced the movements of the murder victim.
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