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About 160 schools around the world now offer course materials free online to the public.
全世界范围内约有160所学校对外提供免费在线课程材料。
youdao
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Microsoft made a public offer to buy the Internet company Yahoo.
微软公开报价，收购网络公司雅虎。
youdao
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Microsoft made a public offer to buy the Internet company Yahoo.
微软公开报价，收购网络公司雅虎。
youdao