英语语法分析

His hosts briefed him about the Darwin plan, explaining it as continuation of a longstanding military partnership under the ANZUS Treaty signed in 1951.

他的东道主国向他简要介绍了达尔文计划，并向其解释这是1951年签订的太平洋共同防卫组织条约下长期存在的军事伙伴关系的延续。

Commodore Leavy: the ANZUS Treaty is the key security agreement between Australia and the United States and allows both our countries to assist each other in times of conflict.

利维准将：澳新美安全条约是澳大利亚与美国之间的一项主要安全协定，让我们两国能互相帮助、共同应对冲突。