UK study suggests phone bans may not be effective 英国研究指出校园手机禁令 ...
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...
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Asteroid contains building blocks of life, say scientists 科学家认为一小行星含有 ...
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...
特朗普“重振美国梦”国会演讲说了些什么？
美国总统唐纳德·特朗普（Donald Trump）自1月就职以来，首次在国会发表演讲，宣称“美国已重返世界舞台”，并阐述了他第二任期的施政蓝图。 Donald Trump said the American dream is "unstoppable" as he addressed a joint session of Congress for the first time since retu ...