He also enlightens me by providing additional background knowledge of history, geography, natural science and sociology, which has broadened my horizons and made me more concerned about social issues.
同时，他会根据需要补充一些历史、地理、自然、社会等方面的背景知识，开拓了我的视野并使我更加关注社会。
He also enlightens me by providing additional background knowledge of history, geography, natural science and sociology, which has broadened my horizons and made me more concerned about social issues.
同时，他会根据需要补充一些历史、地理、自然、社会等方面的背景知识，开拓了我的视野并使我更加关注社会。
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