Translation for "then-unknown" to french
Then-unknown
Translation examples
I completed the development of the Anza program in April 2008, a year after the initial birth defects first began to appear from then-unknown causes.
J'ai terminé la mise au point du programme Anza en avril 2008. Un an après l'apparition des premières anomalies congénitales, pour des causes alors inconnues.
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