确实，这周美国和澳大利亚再次于旧金山就改善两国的安全纽带问题进行讨论。
Indeed, this month Australia and America have been discussing-again in San francisco-how to enhance their security ties.
组织者已经宣布，考虑到安全问题，圣火在旧金山的传递路线已较最初的计划进行了调整。
Organizers have already announced changes to the original path of the relay in San Francisco because of security concerns.
组织者已经宣布，考虑到安全问题，圣火在旧金山的传递路线已较最初的计划进行了调整。
Organizers have already announced changes to the original path of the relay in San Francisco because of security concerns.
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