求翻译：1945年美国成立了全国学校社会工作者协会，它是后来的“全国社会工作者协会”(NASW)的一个重要的组成部分。当代，许多国家设有学校社会工作专业，不同程度地开展了这些工作。是什么意思？

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The United States of America in 1945 established the National Association of social workers, and it is later schools of the National Association of social workers " " (NASW) of an important component. Contemporary, many countries with school social work professionals to carry out in varying degrees.

In 1945 US has established the national school society worker association, it was afterwards “the national society worker association” a (NASW) important constituent.The present age, many countries are equipped with the school social work specialty, the varying degree has done these work.

1945 United States the establishment of the National Association of social workers in schools, it was later the "National Association of social workers" (NASW), an important component. Contemporary, has schools of social work in many countries, these works were carried out in varying degrees.