弥合资金差额：支持流行国家消灭脊灰的努力需要有大量外部财政资源。
Closing the funding gap: Substantial external financial resources are required to support the efforts of endemic countries to eradicate polio.
弥合资金差额：支持流行国家消灭脊灰的努力需要有大量外部财政资源。
Closing the funding gap: Substantial external financial resources are required to support the efforts of endemic countries to eradicate polio.
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