它也在向全世界传达一个信息：在新世纪，美国想要继续维持和加强其领导力。
It should also serve as a message to the world that the United States of America intends to sustain and strengthen our leadership in this young century.
他们为我们在西非抗击埃博拉疫情、挽救生命提供了持续不断的支持，美国的领导力得到全世界的认可。
They've been supporting our efforts in West Africa to fight the Ebola epidemic and save lives. Because in times of crisis and challenge, the world turns to America for leadership.
领导力意味着明智地运用武力，团结全世界的力量实现伟大目标。
Leadership means a wise application of military power, and rallying the world behind causes that are right.
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