名词
中文翻译：水下弹射座椅
同义词：
['submarine ejection seat', 'underwater launch seat']
例句：
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1. The spacecraft's underwater ejection seat was designed to provide extra thrust for the landing.
这个航天器的水下弹射座椅被设计用来为着陆提供额外的推力。
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2. During the test, the pilot had to perform a series of maneuvers using his underwater ejection seat.
在测试期间，飞行员必须使用他的水下弹射座椅执行一系列动作。
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3.The military has been working on developing more advanced underwater ejection seats to improve the safety and efficiency of their submarines.
军队一直在努力开发更先进的水下弹射座椅，以提高潜艇的安全性和效率。