A third brigade is at sea, ready for an amphibious assault.

第三旅在海上待命，随时准备从海上发起进攻。

《柯林斯英汉双解大词典》

But an amphibious assault may confuse them, leaving the most vulnerable open to attack.

但两栖攻击则可使兽群迷惑，并让最脆弱的海象完全暴露在攻击下。

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In October the USS Makin Island, an amphibious assault ship, was the first of 12 hybrid-powered ships to take to the water.

十月份美国船只“马金岛”号，一艘两栖攻击舰，成为12艘混合动力船中第一艘下水的船只。

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Walker is currently being held on the USS Peleliu, an amphibious assault ship in the Arabian Sea.

CNN: Walker: Prison uprising was 'mistake'

What the Marines needed was a successor to their Amphibious Assault Vehicle, or AAV, that debuted in 1972.

FORBES: Marines Fight For Crucial Vehicle As Budget Cuts Loom

And we are shifting in the Marine Corps from an amphibious assault unit, if you will, to a long-term combatant unit.

NPR: Marine Recall Prompts Questions over Iraq Stress