Vows of silence and humanist beliefs led European clerics to create new communication methods for the deaf 500 years ago. Charles-Michel de L'Épée teaching the hearing impaired in his Paris institute.
Tsoom fwv tau teb tej kev tib ua ntuv zus, thaum nws tau los qhia txog 6 cov kev pauv hloov rau tej kev kho se uas lawv tau ...
Tej hauj lwm tsis hais cov kev npaj se, sab laj cai lij choj thiab kev kawm ces yog cov uas tej zaum yuav tsaug tej ...
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