Three decades passed.

三十年斗转星移。

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Two Iranian warships passed through Egypt's Suez Canal for the first time in more than three decades, en route to Syria.

两艘伊朗军舰在向叙利亚航行中经过埃及国有的苏伊士运河，这是三十多年来的第一次。

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Gates cited a congressional act passed three decades ago that allows the U. S. to support Taiwanese defense, despite the two countries' lack of formal diplomatic ties.

盖茨引用了30年前国会通过的《对台关系法》，尽管美国没有与台湾建交，但是该法允许美国对台湾防务进行援助。

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Three decades have passed since the last serious American inflation was vanquished by Ronald Reagan and Paul Volcker.

FORBES: Is President Obama's Depression Coming Our Way?

Over the past three decades Congress not only has never passed any legislation to regulate climate change, but has specifically rejected legislation to give EPA the authority which it now claims.

FORBES: A Pivotal Court Challenge: America vs. the EPA

They also said it would be a break from more than two decades of precedent, which saw three dozen disaster-aid bills passed without offsets.

WSJ: Senate Clears $50.5 Billion Sandy Aid Bill