一、英譯中：請將下列英文譯為中文。（20分） The definition of national security has changed over the years to include terrorism, resource scarcity, migration, and now threats to population health. During the first session of the United Nations Security Council of July 17,2000, the UN declared the HIV/AIDS pandemic a threat to global security. This is the first time in history that an issue of public health has been elevated to such status. While it is now increasingly understood due to the COVID-19 that a pandemic constitutes a tremendous threat to the prosperity and cohesion of countries, the process by which the disease destabilizes societies, economies, governance structures, and the national security apparatus remains opaque to us.