·2,447,543篇论文数据，部分数据来源于NoteExpress
Down's syndrome (DS) is an incurable, heritable disorder affecting an estimated 400,000 people in the U.
唐氏综合症是一种遗传的不治之症，在美国大约有40万患者。
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You might be thinking the second screen makes the Wii U a Wii-plus-DS, and it clearly shares second-screen DNA with Nintendo's dual-screen handheld.
CNN: Nintendo Wii U review: A tale of two screens
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