Помогите перевести предложения на русский язык!!!!By the end of the first

Помогите перевести предложения на российский язык!!!!
By the end of the first decade of the twentieth century , the emphasis in linguistics had shifted from historical analysis to the analysis of the synchronic structure of languages. De Saussure's argument that historical analysis was not relevant for understanding the organization of a given linguistic system when considered in its use by a community of speakers , had an important influence. In addition , Franz Boas and his pupil Edward Sapir , working in North America , showed that the languages of the Native Americans had to be understood in their own terms , since they had grammars and sound sysrems that could not be comprehended in terms of systems derived from European languages.