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撫養孩子
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家居與園藝
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向專家諮詢疫苗的成分
疫苗的成分主要是抗原,這些抗原來自病毒,已經死亡或減弱的細菌。此外,疫苗還含有其他輔助成分,在疾病預防中有一定用途。
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>> Saving a baby falling from the 12th floor of the apartment building,
a real-life superhero appears