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8月12日，在澳大利亚堪培拉，一名科学工作者在科技周活动上向儿童讲解光线吸收和反射的原理。澳大利亚全国科技周12日开幕，活动将持续至20日。其间，澳大利亚各地将举行2000多场活动，预计将有130万人参与。澳大利亚全国科技周旨在宣传科普知识，提高人们特别是儿童对科学、工程、数学、创新等方面的兴趣。今年是澳全国科技周活动创立20周年。新华社发（钱军 摄）
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