名词
中文翻译：Unknown
同义词：
['Passive observer', 'Passive viewer']
例句：
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1.The passive monocular viewer can only see the world through a single eye.
被动单眼观察者只能通过一只眼睛看到世界。
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2.The passive monocular viewer is often used in scientific experiments to study the behavior of animals.
被动单眼观察者常用于科学研究中，以研究动物的行为。
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3.The passive monocular viewer was invented by a scientist who wanted to explore the depths of the universe.
被动单眼观察者是由一位科学家发明的，他想探索宇宙的深处。