| 其他| 1. | Power, John(20200205)。US freedom of navigation patrols in South China Sea hit record high in 2019，https://www.scmp.com/week-asia/politics/article/3048967/us-freedom-navigation-patrols-south-china-sea-hit-record-high。   | | 2. | (20200512)。US Navy Eyes Return to Subic Bay in A Commercial Deal，https://www.onenews.ph/us-navy-eyes-return-to-subic-bay-in-a-commercial-deal/。 | | 3. | Gutierrez, Jason(20200602)。Philippines Backs Off Threat to Terminate Military Pact With U.S.，https://www.nytimes.com/2020/06/02/world/asia/philippines-military-pact-us-duterte.html/。 | |