1954年美台签订了共同防御条约。
英国和葡萄牙两国之间有一个长期的共同防御条约。
Britain has a long-standing treaty with Portugal about mutual defence.
上星期美国国务卿希拉里·克林顿说美国切实履行与菲律宾盟国的共同防御条约。
Last week, U. s. Secretary of State Hillary Rodham Clinton said the U. s. would honor its mutual defense treaty with its ally, the Philippines.
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