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Sign language and its alphabet are standardized to what they are today, where every word in English could be said in sign language (15 giug 1720 anni – 15 giug 2018 anni)

Aggiunto al nastro di tempo:

The Evolution of Sign Language

ByDavid Heineman
5 nov 2017
0
0
472

Data:

15 giug 1720 anni
15 giug 2018 anni
~ 298 years
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