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。USB插槽旁边的小LED应该会疯狂闪烁。请注意，这些票价取代了之前的所有机票。目前正在实施的南共体安全监督组织（SASO）将有助于提高南共体各国的监督能力。 This technique was originally described by a group of researchers and was originally intended to timestamp digital documents so that it's not possible to backdate them or to tamper with them。