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科学60秒:数学好不好是天生的

Some people may just be born with a talent for math. I mean, we’ve known that practicing your times tables makes for better multiplication, but new research shows that our ___1___ sense of numbe...

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Hint: Uganda Gulu Ross Bleckner In recent years, rebel groups in northern Uganda have often kidnapped children. They use boys as soldiers and girls as sex slaves. Some children are later re

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每天，全世界有超过2000名儿童死于意外伤害，溺水是一个首要原因。 Etienne Krug Marseilles Margie PedenEvery day, more than 2,000 children worldwide die from accidental injury. Each year, as many as...

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作为一个商业务经理有20余年的经验。退休四年后，他决定是时候回报社会了...These were leaders of medium-sized businesses, like Home Food Processing and Cannery, a seller of palm oil and spices. Anoth...