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2 天前 · The Theory of Non-Linear Intervention. May 28, 2024. Economics is well known for rather unrealistic theories based upon fundamentally unsound principles, such as the assumption that all things remain equal.
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2019冠狀病毒病疫情是一次由嚴重急性呼吸系統綜合症冠狀病毒2型(SARS-CoV-2)導致的2019冠狀病毒病(COVID-19)所引發的全球大流行疫情。 維基百科