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国防费是用于国家安全防务的资金。由于不同时期国家安全所遭受的威胁程度可能有所不同,因而用于国家安全防务的国防费总量也
Defense costs are used for national security and defense funds. Since the threats to national security may vary from time to time, the total amount of national defense expenditures for national security and defense